I'm a phone tech, and change polarizing film on lcds regularly.... I don't have a strong physics or science background but you do an excellent job of both explaining and entertaining. Thanks again.
Nice video, weird and fantastic this is still new information 30 years after 👍👍. In 1992 my physics project (6th year) involved the design and invention of a hand held optical polarimeter. Had to build it too. Captured my fascination deeply. The rotational dependence of your 3rd filter on color pertains to the relationship its thickness has on light wavelength. A. If the thickness is just right such that multiple odd quarter wavelengths of light (λ/4, 3λ/4, 5λ/4, etc) fit between its faces, then that light will pass through. Multiple half wavelengths will cancel. B. Remember that a quarter wave (λ/4) is also 90° which determines how circular polarization manifests. Rotating a third polarizer in between two others (a linear polarizer and an analyzer) will also change the transmitted color. The trick is to first begin with linearly polarized light. Instead of using cellophane tape an excellent multiple quarter-wavelength polarizer (near yellow light) can be found using scotch tape. Thicknesses is around 2.3 mil or 2300 nm which is happily about four wavelengths at yellow. You will also notice that the diatomic molecules in the upper atmosphere are linearly polarized (in blue) when looking toward the north sky. Works very well when the sun is near meridian (south in the northern hemisphere, so about noon) such that the light experiences a 90° reflection upon traveling to your eyes. So the sun is at your back while you're looking toward the north and the upward angle of view is dependent on your latitude. Not sure where the angle of maximum linear polarization occurs but it likely has something to do with Brewsters angle. 🙂🙂
i seen a lot of videos on TH-cam and i think that was the best vid explaining such a difficult subject that I've ever scene. next to the animated series physics videos by eugene but yours didn't put me to sleep
This is so wrong. Polarizers are not capable of changing the wavelengths of EM waves and no color change is happening. As the polarizer is being rotated, some components of waves are being filtered by the polarizer (that's why also called polarizing filter), and therefore reducing the intensity of surface reflected light as it pass through the polarizer.
@@bryanfuentes1452 he never said that the polarizer was changing the wavelength... He just said that it is canceling out the other wavelengths of light and thus polarizing.
It's generally easier to think about just electrical potential if you can. The magnetic component is equal to the rate of change in the electrical component.
Well, non-polarized or incoherent or broad spectrum light is really hard to depict. It has quantum mechanical weirdness. The relationship between the e and m components is well defined, but hard to visualize unless you simplify to polarized, coherent light, single-wavelength light. Except for lasers, light is generally not even in a particular phase in the first place.
I watched the Minute Physics video on this subject like 10 times but it just made no sense Your video is so good! Offering an intuitive explanation of whats actually happening, instead of just leaving it at "unexplainable quantum effects that break the laws of the universe"
Here's another neat trick that I discovered after watching this video: 1. Put on a pair of 3D Glasses. 2. Look at your phone. (It might help to turn your screen timeout to 1min or more. Also, I looked at mine when there was no other light in the room.) 3. Rotate your phone. You should be able to see different shades of color. (Also, the glasses I used were for an IMAX 3D movie.) 4. Try closing one eye at a time while rotating your phone. (I discovered that the left lense blocked most of the light while my phone was horizontal; while the right lense blocked out most of the light while my phone was vertical.) POLARIZATION!
I was studying mantis shrimp and didn't understand anything about the polarized light and when I looked at TH-cam you were the first to pop up. Thanks for the help!
Hey Eric, great video. We just referenced it in our video on removing reflections. Instead of going into the details and a deep dive of how polarizers work for video, we just said hey, go watch Eric's awesome explanation.
Homeschoolers here!! Great video for basic understanding of polarization for my grade 5 and grade 7 boys. Well done!! You may want to reach out to homeschool companies and put together a video series. God Bless
I saw a video that talked about circular polarized light, and had no idea what that was. Thanks for breaking it down in a way I can understand! Hope to see more vids!!
Circular polarizes twist the polarization angle depending on its wavelength. If you start out with linear polarized white light and pass it through a circular polarizer, each color (wavelength) will exit at a different polarization angle. Now use a another linear polarizer after that to dial in the color you want to pass. I think this is done on stage lights instead of color filters and permits smooth transitions from one color to another.
Ok. i seem to have an idea. maybe is due to the way the lighting is set up. somehow the white light reflecting off of the white background is polarized in a way where each light color is polarized at different angles so that when the polarizer is rotated it only lets that specific wavelength go through. the more interesting question would be what is polarizing the light in that specific pattern. is it the light bulb itself or some material that is reflecting it. in either case the polarization is wavelength bias.
I took so many notes! Ahh this helps better my understanding of my own experiments with polarization & Reflected shadows. P L U S it may shed light to the color effect. Polarized experiment: I have one pair of sunglasses that have a light blue tint. When looking thru them its like any other shades. B U T when looking thru another polarized surface (side windows in cars, iphone 5, certain digital screens) I see a vivid 45 degree pattern of mostly purple shades on any reflective objects. This is best achieved in a car with polarized side windows, [the windshield only has an outside tint] Reflected Shadows: For this I used a light source [sun or lamp], an object of focus [A Mario bobblehead], a reflective surface [glass desk], & view surface for shadows [my wall] / O K; Sunlight enters my window, hits the glass desk with Mario on it & bounces a shadow onto the wall. Easy enough... The wierd part is however, on my wall is a double shadow [one shadow up, one copied shadow down] I added a moving object [hanging yo-yo] moving it closer/further from shadow wall in relation to glass table and managed to make it look like the yo-yo comes D O W N into shadow zone from T O P, crosses zone, exits B O T T O M and repeats itself / entering from the T O P again In relation to your video, this helped me understand the "extra" duplicate shadows slightly to the left and right of actual shadows sometimes. A L S O it seems that your last experiment depicted an interesting concept of how color is distributed thru the sky. The 3rd square allows the unlimited freedom of the polarized light but when it reaches it, depending on what angle it is [45 like you mentioned] in relation to the polarized camera lenses[or lens] it bounces back in a circular direction giving you the different colors. Ahh but colors are different frequencies and speeds so now Im stuck back at how this works haha
Tis is the best explanation video I have ever watched on you tube. Are you a Professor? Well done you. Thank you with deep gratitude and appreciation. Excellent presentation.
Please use this to talk about the famous slit experiment about Quantum Mechanics. I would like to hear your perspective of how light changes its behavior depending on whether you're observing it or not. TY.
I would like to see the colourful filter rotated to cover the entire camera lens view while filming something. I would like to see the effect of moving through the rainbow filter for the entire screen. You may have a very cool video effect there when expanded to full screen.
The Universe works in pairs (dualism) and circulair motion (half circle is a wave. A circle is the most efficient way for Energy). With a circle it doesn’t matter at which position it begins. It will always be the fastest path from point A to point B. (brachistochrone curve)
Awesome! The first 8min are a tour-de-force through all related concepts, very compact-luckily, I am already familiar with this concepts. Then at 8:00 starts the explanation of polarization with a simple guitar string..awesome! I had this „AHA!“ moment, realizing how simple it actually is-but only after seeing your demo with a guitar-brilliant didactic idea ❤👍
You definitely deserve more subs! Thanks for the great video, passionated and easy to understand while it covers the topic and explains it well. You have earned one more sub
Second follow up. It's possible the reason why experimental and secret aircraft (mistaken for alien UFOs ) are suddenly visible with certain cameras is due to the effects of polarimetry.
Hi there. There is an interesting yet little known about model of light that explains the nature of impossible colours. en.wikipedia.org/wiki/Impossible_color The two light waves are thus organised through the nature of the musical octave (1/2) and musical 5th (3/2). I think what you have stumbled upon is explained by this nature. Great video by the way.
I am not an "expert" but here is my guess: The linear polarizer is simply refracting light from the full spectra along a single axis. Ambient light is is all colors/wavelengths. As you rotate the polarizer is is polarizing different wavelengths based on their phase angle.
I think you cannot see the colors because the light is bouncing off the squares as the spectrum traveling into the camera, while the light that passes through is not and travels to your eye. Two sources of input in different locations.
if we stacked enough translucent polarization layers to form a cube, could we theoretically not precisely create the location in 3D space, for a photon to light up, e.g. a volumetric display? if you stopped or polarized the light in the middle of the cube, and then used the light blocking property of the now electrically visible screen there, to light up there locally in the middle of the cube, and had enough images to fool the eye of course.
different frequency light gets bent by different amounts , turning the filter changes the incident angle and thus changes which light is reflected or refracted . probably more to it .
I think particles like photons are in orbit likely with dark matter particles giving them an apparent axial wave as travel, or an apparent helical wave (circular polarization), depending on the orientation of the orbit. And I think light has the ability to travel faster, it's the dark matter interaction that's the limiting factor.
At the end of the video reminds me of the reflections on my GShock Aviator watch. If I hold the reflection just right, I can turn my hand and it will change color like that.
Maybe what happens is that the nearest electron gets the "signal" and once that happens what we see as light is just the fields updating. But the electron has already got the signal.
The color separation change with the angle of the 3rd polarizer. One of the 3 is a circular polarizer filter? Since these filters introduce a delay of a quarter wavelength, and the speed change in transparent material with wavelength, .... Am I getting close to the answer?
Hey bub! (No idea why I said that)? Microwave ovens use 10-12cm waves from their 1940s derived high def RADAR magnetrons. Certainly not 1cm, even though that still lands in the microwave territory. This is why you MUST use the spinning platter otherwise only the bony end of your drum stick will get hot.
+Martin D A Yeah, good point - didn't mean to imply it was typical, just the minimum. Even at shorter wavelengths, there could be destructive interference that requires a turntable.
Does a circular polarized guitar string sound different than linear? Maybe this is a way to make a unique sound. Or maybe this is what violinists are doing with their strings as they change the angle of their strokes? Or maybe it doesn't sound different at all? Do musicians know?
The talk is nicely is nicely accompanied by demo. But circular polarization with stretching is not clear. There are only patches of light passing here and there. But I am impressed. The sheet polaroid are not perfect linealy polarizers, I hope.
Hi, I have a problem with my LCD display. The display was monochrome. After removing the polarizing film and rotating it by 90 degrees, the colors have changed. The black has changed to white and white to black. After removing the next filter (transparent, which was under the polarizing filter) and re-applying the polarizing filter, the colors change - yellow, purple, green ..... and I can not use black. I am asking for a hint of what's stuck under the polarizing filter, what should I look for to "fix" my display. On my channel there are videos that show the problem :( Thank you in advance for a thank you.
Gosh, your video helped me understand quite a few things about light. I've been on a quest to understand more about quantum mechanics and entanglement and they brought me here. Hey, make more videos! ;-)
To answer the final question, one really needs to think about the standard model of light in the first place. If anyone's interested in adding to this discussion...: physics.stackexchange.com/questions/195941/concerning-the-dark-bands-in-the-light-wave-interference-pattern ...then, please do so. It asks basically "is light really a transverse (up/down) wave?" while providing evidence for the contrary.
about the last experiment, the wavelight varies accord to the angle of inclination with the secondary filter, more open is more wavelenghts passing through (all the range between 800-400nm as example), the less is the angle the less is the wavelenght allowed to pass (420-400nm as example). Please correct me if i'm wrong
Thanks for this video! Do you have any insight of what is going on with the polarizing filters in the end of your video? Any sources that could be of some use?
I think the filters breakdown the field, try to use polarized filters that reflects 50% polarized light, like polarized mirror. I believe those filters breakdown and mergers the field The light must be there, the filters just changes to a spectrum we are not able to see it, using mirroring polarized erases the light we are not able to see it. The mirror and polarization must be in the same layer.
***** You obviously pulled that out of the air. The simplest polarizers are just doped transparent plastic that are stretched. Anyway even 500 USD isn't that much for something which is supposed to be used for decades.
I just found out I can use this magic plastic to solve the problem of two TVs both receiving signals from both remotes so I can't operate them independently. I feel like Iron Man when he figured out time travel.
Polarization is affected by frequency of the light as well. Think of it like cars going around the bend of a road. Faster cars will tend to fly off the road because their tires cannot maintain the frictional force required to maintain traction. Higher frequencies of light produce the same effects. This is why the lasers used in fiber optics have different bend radii limitations. The same thing happens in a prism. Higher frequencies refract more causing a separation of white light into all the different frequencies. You see the same thing in iridescence. The thin film of oil on water will have different thicknesses which cause different frequencies of light to reflect and refract at those points. This iridescence is also achieved by micro structures in certain insect wings and bird feathers, especially in male peacock feathers. Tiny microstructures in the feather/wing create steps of reflective surfaces that cause light to travel at slightly different distances after reflecting off the various multi-leveled surfaces.
I have been looking for an explanation on HOW light is reflected or refracted at a medium boundary and I came across your video. Thanks for your efforts. My theory is that light, being a wave, goes through a rotation as it partially enters the region of space around an electron in a crystal. Depending on the angle of that vibration, that wave will lose energy to the “electron well” in the form of rotating its angle of vibration. So it’s not so much that polarizer are absorbing particular photons. It’s absorbing some of those photos momentum which is comprised of its amplitude and frequency. Polarizers only absorb the amplitude portion of that momentum to roseate that photon to a new polarization mode (angle of vibration). If a photon has to rotate 90 degrees, it loses all of its momentum by losing all of its amplitude. This loss of momentum is represented by an increase in electron momentum in the material, which results in kinetic energy spread over the whole system as represented by thermal energy. The angle of incidence between a photon and the interface between two media determines how much of the light is reflected and how much is refracted. The reflected light is polarized in one direction while the refracted light is polarized in the opposite direction. Another way you can visualize all of this is by observing celestial motion. An object flying past a massive object will have its path “refracted” toward the massive object. Depending on the angle of the in coming object and its velocity, the change in direction will be different. Faster objects will deflect less. Steeper angles of approach will result in partial orbits causing the object to leave in nearly the opposite direction that it approached. More massive objects will create more drastic effects. Now toss in precession. 😂
Precession is the result of one vector type interacting with a different vector type. If I push a box east, and you push that box north, you’ll have a resultant vector of motion north east. Easy to understand, right? Vector addition is cool like that. Now, sit on a stool that can freely rotate. Hold a bike wheel by its axle with the wheel vertical. Have somebody spin that wheel very fast. This works best with a wheal that has a high angular momentum; more massive away from the center of rotation and faster rotation. Now that the wheel is spinning very fast, rotate the axis of rotation by changing the angle of the axel from horizontal. YOU begin to spin on the stool. The angular momentum is a force vector that is perpendicular to the plane of rotation (its along the axis of rotation). You apply a different force vector when rotating that axis. The resulting vector is perpendicular to both of those vectors. You see the same thing with a spinning top. If that top’s spin is not aligned with the force of gravity, its angular momentum vector and gravity vector will combine into a lateral force vector which will cause the top’s top to slowly precess in a circular motion. Now apply the concept of precession to a photons polarity mode, and the electromagnetic force field it flies through near the electrons between two different transparent materials (air and water; air and glass; glass and water...). That photon will have to precess while traveling from one electromagnetic field of one material into the electromagnetic field of another material. That transition is what causes light to refract (polarize perpendicular to the transition plane) or reflect (polarize parallel to the transition plane). Even light that hits a transition plane refracts and reflects a certain amount. All waves do that. It’s an effect that affects high frequency electrical communications on coaxial cable and twisted pair wires as well as fiber optics.
The reason for my research is that, as a fiber optic cable splicing technician, I learned things about light that was important to my job. Lasers are not polarized. The pulses that travel down a light wave guide (core) will “smear” based on the polarization mode of the pulse. When one mode of the light travels faster than the other mode of that light, different pulses will begin to overlap by the time they reach a receiver. Polarization Mode Dispersion was not an issue when bandwidth was much lower in early fiber optic communications. The pulses were longer and more spread out. It was like talking the same rate as somebody could listen. Processing each word could be done linearly and distinctly. However, as bandwidth goes up, pulses and time time between pulses go down.. My theory is that a crystal can be inserted after a transceiver that can generate two distinct pulses at different polarization modes. And two receivers at the other end can process two completely different signals from the same exact frequency on the exact same fiber. Moreover, applying this concept to other modes than just the vertical and horizontal mode can provide even more modes for distinct channels. We can already cram dozens of different “colors” of light on the same fiber for dense wave communications, but imagining doubling, quadrupling, or increasing each frequency 16x or 32x times. A single fiber could carry far more information that it currently can without being limited by frequency. Transmission of signal is limited by the wavelength of the carrier wave. You need a whole wave to distinguish between “on” and “off” and light used in fiber optics has a finite wavelength. We have remedied that limitation by utilizing different frequencies. Next we work on different modes.
Perhaps you can do your next video showing how you can transmit one picture using light polarized in one direction and another picture using light polarized in another direction. Then, you rotate a polarizer to reveal one picture or another.
Basically a guess, but, to your last point, it seems like the only way polarizing the light would create different colors is if the source light was made up of certain colored light with certain polarizations. I would want to test with different light sources and see the differences. Are you using fluorescent light? Great video by the way, had me laughing :)
Hey +Eric Mickelsen ! I was wondering if the lights of different wavelengths undergo polarization differently (as in the case of difference in refractive index from red to blue thereby different polarizing angles), that might be the reason for obtaining single color only for a certain configuration at the end of the vid. I am really intrigued by polarization, and your video was cool!
The different colors we can see because it passes only one wavelength of light and blocks all other!!!? May be color depends on which type of polariser is it, as the experiment shown here in oven?
Right, and the higgs boson met the quaternium isotope in a bar somewhere, Wi-Phy. So, I only saw one demonstration of a polarizer, and it was pretty cool. But you didn't really explain how it works, you only explained how the physics behind light works. Could you demonstrate what a polarizer IS? Like...what does it look like, up close? A bunch of lines across a film? Isn't that more like, a dimmer?
That's exactly what it is. They will look different up close depending how they are made. But they are literally just microscopic, parallel wires. goo.gl/images/YcDcxW
@@EricMickelsen Wow. A poster that actually responds. That, is truly new to me. Thank you. But, I do then, Mr Know-It-All, have a few more questions. What's the distance between these lines? I can't help but visualize them as microscopic "shades" or "blinds." Does this matter? How does it affect the EM wave? Too short in blocks all the light, not short enough, it doesn't do much of anything in terms of ensuring "uniform orientation of the waveform." That doesn't explain the phenomena th-cam.com/video/gP751qpm4n4/w-d-xo.html @ 4:30. I'm really trying to figure out the "quantum physics" here.
I don't know the precise relationship, but the distance between lines needs to be in the same ballpark as the wavelength of the light. Thickness may also matter a bit, but barely. Think of it this way: electrons can move on these "wires" in one axis, so they can make an electromagnetic wave in that polarization. The motion of the electrons is induced by the light itself, and the electromagnetic wave produced by that election motion gets added into the light. The wires need to constrain the electrons to move in that one axis, and they need to be able to move roughly a wavelength in that axis, but not the other axes. The weird brightening quantum effect comes in because the electrons in multiple filters and the light itself have quantum properties that interact and form a wave function that is not observed or collapsed until the photon is absorbed by the camera or eye.
+Todd Gobbett I have a hypothesis. I'm waiting to see what other people think in case there's a better idea out there. I like Lily's idea about the different amounts of refraction for different colors - I hadn't really thought about that - but I haven't found any way to turn that effect into a solution, so I still like my secret theory the best.
blows my mind that people are even able to figure this out.
Methodological naturalism
ur video is not just physics, but mentally soothing
I'm a phone tech, and change polarizing film on lcds regularly.... I don't have a strong physics or science background but you do an excellent job of both explaining and entertaining. Thanks again.
Nice video, weird and fantastic this is still new information 30 years after 👍👍. In 1992 my physics project (6th year) involved the design and invention of a hand held optical polarimeter. Had to build it too. Captured my fascination deeply. The rotational dependence of your 3rd filter on color pertains to the relationship its thickness has on light wavelength. A. If the thickness is just right such that multiple odd quarter wavelengths of light (λ/4, 3λ/4, 5λ/4, etc) fit between its faces, then that light will pass through. Multiple half wavelengths will cancel. B. Remember that a quarter wave (λ/4) is also 90° which determines how circular polarization manifests. Rotating a third polarizer in between two others (a linear polarizer and an analyzer) will also change the transmitted color. The trick is to first begin with linearly polarized light.
Instead of using cellophane tape an excellent multiple quarter-wavelength polarizer (near yellow light) can be found using scotch tape. Thicknesses is around 2.3 mil or 2300 nm which is happily about four wavelengths at yellow.
You will also notice that the diatomic molecules in the upper atmosphere are linearly polarized (in blue) when looking toward the north sky. Works very well when the sun is near meridian (south in the northern hemisphere, so about noon) such that the light experiences a 90° reflection upon traveling to your eyes. So the sun is at your back while you're looking toward the north and the upward angle of view is dependent on your latitude. Not sure where the angle of maximum linear polarization occurs but it likely has something to do with Brewsters angle. 🙂🙂
you are an wonderful presenter.
i seen a lot of videos on TH-cam and i think that was the best vid explaining such a difficult subject that I've ever scene.
next to the animated series physics videos by eugene
but yours didn't put me to sleep
I agree. very well presented.
You are changing the perceived wavelengths of light when you spin the polarizers and that is why you see the colors changing.
how, polarizers only change orientation,,, i wonder if it has to do with a time effect, like fermats principle of least time
This is so wrong. Polarizers are not capable of changing the wavelengths of EM waves and no color change is happening. As the polarizer is being rotated, some components of waves are being filtered by the polarizer (that's why also called polarizing filter), and therefore reducing the intensity of surface reflected light as it pass through the polarizer.
@@bryanfuentes1452 it just changes the angular orientation, no?
@@bryanfuentes1452 he never said that the polarizer was changing the wavelength... He just said that it is canceling out the other wavelengths of light and thus polarizing.
Lately I started wondering about polarized light. So I did a little research and a few experiments.
+vril ya Yes, they are exactly 90 degrees out of phase.
***** I hope they aren't. Do you have an example?
It's generally easier to think about just electrical potential if you can. The magnetic component is equal to the rate of change in the electrical component.
Well, non-polarized or incoherent or broad spectrum light is really hard to depict. It has quantum mechanical weirdness. The relationship between the e and m components is well defined, but hard to visualize unless you simplify to polarized, coherent light, single-wavelength light. Except for lasers, light is generally not even in a particular phase in the first place.
@Eric Mickelsen. Excellent video and very instructive. Thank you.
I watched the Minute Physics video on this subject like 10 times but it just made no sense
Your video is so good! Offering an intuitive explanation of whats actually happening, instead of just leaving it at "unexplainable quantum effects that break the laws of the universe"
Here's another neat trick that I discovered after watching this video:
1. Put on a pair of 3D Glasses.
2. Look at your phone. (It might help to turn your screen timeout to 1min or more. Also, I looked at mine when there was no other light in the room.)
3. Rotate your phone. You should be able to see different shades of color. (Also, the glasses I used were for an IMAX 3D movie.)
4. Try closing one eye at a time while rotating your phone. (I discovered that the left lense blocked most of the light while my phone was horizontal; while the right lense blocked out most of the light while my phone was vertical.)
POLARIZATION!
Kim Bayer that's right. The lenses are circularly polarized, in opposite directions.
Because it combines 2 difference image to 3D
I was studying mantis shrimp and didn't understand anything about the polarized light and when I looked at TH-cam you were the first to pop up. Thanks for the help!
This is actually the best video explaining polarizers on youtube.
If only you were my physics professor, I might actually loved the subject back in college itself. Awesome explanation man!
this channel is underrated. U should have more subscribers. Keep doing good job. All the best
Hey Eric, great video. We just referenced it in our video on removing reflections. Instead of going into the details and a deep dive of how polarizers work for video, we just said hey, go watch Eric's awesome explanation.
Thats bad. Cause there is more simple and at the same time more wide explanation of polarized light on youtube.
and apperently im not the only one that thinks that.
you got something good working for you mister.
i hope you all the best
Homeschoolers here!! Great video for basic understanding of polarization for my grade 5 and grade 7 boys. Well done!! You may want to reach out to homeschool companies and put together a video series. God Bless
I saw a video that talked about circular polarized light, and had no idea what that was. Thanks for breaking it down in a way I can understand! Hope to see more vids!!
Circular polarizes twist the polarization angle depending on its wavelength. If you start out with linear polarized white light and pass it through a circular polarizer, each color (wavelength) will exit at a different polarization angle. Now use a another linear polarizer after that to dial in the color you want to pass. I think this is done on stage lights instead of color filters and permits smooth transitions from one color to another.
One of the best science episodes on youtube, ever!!! thanks Eric. You made my day. Love&light!
that was a great question right at the end. i'm a physics student but have no clue about the colors changing due to respective angle of the polarizer.
Ok. i seem to have an idea. maybe is due to the way the lighting is set up. somehow the white light reflecting off of the white background is polarized in a way where each light color is polarized at different angles so that when the polarizer is rotated it only lets that specific wavelength go through. the more interesting question would be what is polarizing the light in that specific pattern. is it the light bulb itself or some material that is reflecting it. in either case the polarization is wavelength bias.
Ha I was just looking at those polarizing films before I came here. Noticed the size, the quality, and thought "sounds like the ones." Great video!
Heyyy, your video and explanation should have more views^^ I loved it, specially because it inspired me to make design ideas for my Thesis 🤩
I took so many notes! Ahh this helps better my understanding of my own experiments with polarization & Reflected shadows. P L U S it may shed light to the color effect.
Polarized experiment: I have one pair of sunglasses that have a light blue tint. When looking thru them its like any other shades. B U T when looking thru another polarized surface (side windows in cars, iphone 5, certain digital screens) I see a vivid 45 degree pattern of mostly purple shades on any reflective objects. This is best achieved in a car with polarized side windows, [the windshield only has an outside tint]
Reflected Shadows: For this I used a light source [sun or lamp], an object of focus [A Mario bobblehead], a reflective surface [glass desk], & view surface for shadows [my wall] / O K; Sunlight enters my window, hits the glass desk with Mario on it & bounces a shadow onto the wall. Easy enough... The wierd part is however, on my wall is a double shadow [one shadow up, one copied shadow down] I added a moving object [hanging yo-yo] moving it closer/further from shadow wall in relation to glass table and managed to make it look like the yo-yo comes D O W N into shadow zone from T O P, crosses zone, exits B O T T O M and repeats itself / entering from the T O P again
In relation to your video, this helped me understand the "extra" duplicate shadows slightly to the left and right of actual shadows sometimes. A L S O it seems that your last experiment depicted an interesting concept of how color is distributed thru the sky. The 3rd square allows the unlimited freedom of the polarized light but when it reaches it, depending on what angle it is [45 like you mentioned] in relation to the polarized camera lenses[or lens] it bounces back in a circular direction giving you the different colors. Ahh but colors are different frequencies and speeds so now Im stuck back at how this works haha
Tis is the best explanation video I have ever watched on you tube. Are you a Professor? Well done you. Thank you with deep gratitude and appreciation. Excellent presentation.
"Im not a physicist" but I can tell your a mathematician and a good teacher
Please use this to talk about the famous slit experiment about Quantum Mechanics. I would like to hear your perspective of how light changes its behavior depending on whether you're observing it or not. TY.
I would like to see the colourful filter rotated to cover the entire camera lens view while filming something. I would like to see the effect of moving through the rainbow filter for the entire screen. You may have a very cool video effect there when expanded to full screen.
The Universe works in pairs (dualism) and circulair motion (half circle is a wave. A circle is the most efficient way for Energy). With a circle it doesn’t matter at which position it begins. It will always be the fastest path from point A to point B. (brachistochrone curve)
Awesome!
The first 8min are a tour-de-force through all related concepts, very compact-luckily, I am already familiar with this concepts.
Then at 8:00 starts the explanation of polarization with a simple guitar string..awesome! I had this „AHA!“ moment, realizing how simple it actually is-but only after seeing your demo with a guitar-brilliant didactic idea ❤👍
So.. light can act as a particle..as a wave..and now as a string?
Cool!
You definitely deserve more subs! Thanks for the great video, passionated and easy to understand while it covers the topic and explains it well. You have earned one more sub
sweet! i think the aforementioned principle is used to modulate the warmth in the picture. or the scenery choice.
Second follow up. It's possible the reason why experimental and secret aircraft (mistaken for alien UFOs ) are suddenly visible with certain cameras is due to the effects of polarimetry.
Hi there. There is an interesting yet little known about model of light that explains the nature of impossible colours. en.wikipedia.org/wiki/Impossible_color
The two light waves are thus organised through the nature of the musical octave (1/2) and musical 5th (3/2). I think what you have stumbled upon is explained by this nature. Great video by the way.
I am not an "expert" but here is my guess: The linear polarizer is simply refracting light from the full spectra along a single axis. Ambient light is is all colors/wavelengths. As you rotate the polarizer is is polarizing different wavelengths based on their phase angle.
just happened that my guitar was right next to me. IT WORKS!
Amazing my brain just waking up with your explaination
I study B.S physics and you sure know a lot more than I do!
Thanks
This very helpful and entertaining at the same time. We need more people like you! Thanks
Thank you so much. I know nothing about physics, yet you make this so easy to get. Keep it coming!
I think you cannot see the colors because the light is bouncing off the squares as the spectrum traveling into the camera, while the light that passes through is not and travels to your eye. Two sources of input in different locations.
if we stacked enough translucent polarization layers to form a cube, could we theoretically not precisely create the location in 3D space, for a photon to light up, e.g. a volumetric display? if you stopped or polarized the light in the middle of the cube, and then used the light blocking property of the now electrically visible screen there, to light up there locally in the middle of the cube, and had enough images to fool the eye of course.
different frequency light gets bent by different amounts , turning the filter changes the incident angle and thus changes which light is reflected or refracted . probably more to it .
I think particles like photons are in orbit likely with dark matter particles giving them an apparent axial wave as travel, or an apparent helical wave (circular polarization), depending on the orientation of the orbit. And I think light has the ability to travel faster, it's the dark matter interaction that's the limiting factor.
+sanjuansteve Anything a photon orbits is a black hole, and if light interacted with dark matter, it wouldn't be dark.
the dielectric constant change with the frequency this is why you are able to filter the white light, i guess
This was a very fun way to look at this, it was awesome
At the end of the video reminds me of the reflections on my GShock Aviator watch. If I hold the reflection just right, I can turn my hand and it will change color like that.
Maybe what happens is that the nearest electron gets the "signal" and once that happens what we see as light is just the fields updating. But the electron has already got the signal.
So you're telling me the most true to reality I've ever seen reality was on psychedelics? Woah
Best physics teaching with practical
The color separation change with the angle of the 3rd polarizer.
One of the 3 is a circular polarizer filter? Since these filters introduce a delay of a quarter wavelength, and the speed change in transparent material with wavelength, .... Am I getting close to the answer?
Hey bub! (No idea why I said that)? Microwave ovens use 10-12cm waves from their 1940s derived high def RADAR magnetrons. Certainly not 1cm, even though that still lands in the microwave territory. This is why you MUST use the spinning platter otherwise only the bony end of your drum stick will get hot.
+Martin D A Yeah, good point - didn't mean to imply it was typical, just the minimum. Even at shorter wavelengths, there could be destructive interference that requires a turntable.
I opened the video because I saw a cute guy talking about polarization. I stayed because his explanation is very good and funny.
Does a circular polarized guitar string sound different than linear? Maybe this is a way to make a unique sound. Or maybe this is what violinists are doing with their strings as they change the angle of their strokes? Or maybe it doesn't sound different at all? Do musicians know?
Please make more video about anything thank you!
The talk is nicely is nicely accompanied by demo. But circular polarization with stretching is not clear. There are only patches of light passing here and there. But I am impressed. The sheet polaroid are not perfect linealy polarizers, I hope.
Hi, I have a problem with my LCD display. The display was monochrome. After removing the polarizing film and rotating it by 90 degrees, the colors have changed. The black has changed to white and white to black. After removing the next filter (transparent, which was under the polarizing filter) and re-applying the polarizing filter, the colors change - yellow, purple, green ..... and I can not use black. I am asking for a hint of what's stuck under the polarizing filter, what should I look for to "fix" my display. On my channel there are videos that show the problem :( Thank you in advance for a thank you.
Just a brilliant, and entertaining presentation on a subject that students have issues with. Thank you!
Gosh, your video helped me understand quite a few things about light. I've been on a quest to understand more about quantum mechanics and entanglement and they brought me here. Hey, make more videos! ;-)
To answer the final question, one really needs to think about the standard model of light in the first place. If anyone's interested in adding to this discussion...: physics.stackexchange.com/questions/195941/concerning-the-dark-bands-in-the-light-wave-interference-pattern
...then, please do so.
It asks basically "is light really a transverse (up/down) wave?" while providing evidence for the contrary.
nice video using this for help for my physics class
about the last experiment, the wavelight varies accord to the angle of inclination with the secondary filter, more open is more wavelenghts passing through (all the range between 800-400nm as example), the less is the angle the less is the wavelenght allowed to pass (420-400nm as example). Please correct me if i'm wrong
+ignacio carrasco I think you're on the right track.
great video..my physics teacher showed it in the class.
I can explain it classically, no QM needed.
Particles as separate objects don't exist. They are only mathematical abstractions of QM.
Thanks for this video! Do you have any insight of what is going on with the polarizing filters in the end of your video? Any sources that could be of some use?
LunaNympha I honestly don't have any sources for that, but if you found one, I would love to read it!
I think the filters breakdown the field, try to use polarized filters that reflects 50% polarized light, like polarized mirror. I believe those filters breakdown and mergers the field The light must be there, the filters just changes to a spectrum we are not able to see it, using mirroring polarized erases the light we are not able to see it. The mirror and polarization must be in the same layer.
very well done and explained.. this channel should have far more subscribers!
Can all of the wavelengths on the electromagnetic spectrum be polarized? Thanks
A very good and simple explanation for something that's a pretty complex subject :)
this is very, very good. thank you for sharing your intellectual journey to aid mine! (and ours)
This was amazing and you're a legend!!
@Eric Mickelsen. Excellent video and very instructive. Thank you.
This is a great explanation - thank-you for posting! :)
I think the wave length is changing by turning the linier polarizer .
So i basically did this experiment when watching this video on my PS Vita while wearing my polarized sunglasses? Funky!
Please make vedio on how can we make a polarizer
could polarisation be used to make windows that can block light or let it pass depending of the alignment of the materials?
+ThePapino134 certainly
*****
You obviously pulled that out of the air. The simplest polarizers are just doped transparent plastic that are stretched. Anyway even 500 USD isn't that much for something which is supposed to be used for decades.
*****
Oh yeah, the real issue is that you need to rotate them to continously change transparency, so you need circular windows.
(Huh, my first comment here was removed without a squeak. It didn't have anything objectionable in it. How "nice"...)
Can't remember if I saw it first on NextStep or Beyond2000 - yeah! back in those days.
I just found out I can use this magic plastic to solve the problem of two TVs both receiving signals from both remotes so I can't operate them independently. I feel like Iron Man when he figured out time travel.
For avoid reflect from water when shoting on camera circle polarized need or linear
Thank you very much for the video. Very good explanation. Please do more!
Your Photo is so wonderful and give me dreams.I feel that I had meet you before ❤
I need help figuring out the proper way to reinstall the film in my home projector
Polarization is affected by frequency of the light as well.
Think of it like cars going around the bend of a road. Faster cars will tend to fly off the road because their tires cannot maintain the frictional force required to maintain traction.
Higher frequencies of light produce the same effects. This is why the lasers used in fiber optics have different bend radii limitations.
The same thing happens in a prism. Higher frequencies refract more causing a separation of white light into all the different frequencies.
You see the same thing in iridescence. The thin film of oil on water will have different thicknesses which cause different frequencies of light to reflect and refract at those points. This iridescence is also achieved by micro structures in certain insect wings and bird feathers, especially in male peacock feathers. Tiny microstructures in the feather/wing create steps of reflective surfaces that cause light to travel at slightly different distances after reflecting off the various multi-leveled surfaces.
I have been looking for an explanation on HOW light is reflected or refracted at a medium boundary and I came across your video. Thanks for your efforts.
My theory is that light, being a wave, goes through a rotation as it partially enters the region of space around an electron in a crystal. Depending on the angle of that vibration, that wave will lose energy to the “electron well” in the form of rotating its angle of vibration. So it’s not so much that polarizer are absorbing particular photons. It’s absorbing some of those photos momentum which is comprised of its amplitude and frequency. Polarizers only absorb the amplitude portion of that momentum to roseate that photon to a new polarization mode (angle of vibration). If a photon has to rotate 90 degrees, it loses all of its momentum by losing all of its amplitude. This loss of momentum is represented by an increase in electron momentum in the material, which results in kinetic energy spread over the whole system as represented by thermal energy.
The angle of incidence between a photon and the interface between two media determines how much of the light is reflected and how much is refracted. The reflected light is polarized in one direction while the refracted light is polarized in the opposite direction.
Another way you can visualize all of this is by observing celestial motion. An object flying past a massive object will have its path “refracted” toward the massive object. Depending on the angle of the in coming object and its velocity, the change in direction will be different. Faster objects will deflect less. Steeper angles of approach will result in partial orbits causing the object to leave in nearly the opposite direction that it approached. More massive objects will create more drastic effects.
Now toss in precession. 😂
Precession is the result of one vector type interacting with a different vector type.
If I push a box east, and you push that box north, you’ll have a resultant vector of motion north east. Easy to understand, right? Vector addition is cool like that.
Now, sit on a stool that can freely rotate. Hold a bike wheel by its axle with the wheel vertical. Have somebody spin that wheel very fast. This works best with a wheal that has a high angular momentum; more massive away from the center of rotation and faster rotation.
Now that the wheel is spinning very fast, rotate the axis of rotation by changing the angle of the axel from horizontal.
YOU begin to spin on the stool.
The angular momentum is a force vector that is perpendicular to the plane of rotation (its along the axis of rotation). You apply a different force vector when rotating that axis. The resulting vector is perpendicular to both of those vectors. You see the same thing with a spinning top. If that top’s spin is not aligned with the force of gravity, its angular momentum vector and gravity vector will combine into a lateral force vector which will cause the top’s top to slowly precess in a circular motion.
Now apply the concept of precession to a photons polarity mode, and the electromagnetic force field it flies through near the electrons between two different transparent materials (air and water; air and glass; glass and water...). That photon will have to precess while traveling from one electromagnetic field of one material into the electromagnetic field of another material. That transition is what causes light to refract (polarize perpendicular to the transition plane) or reflect (polarize parallel to the transition plane). Even light that hits a transition plane refracts and reflects a certain amount. All waves do that. It’s an effect that affects high frequency electrical communications on coaxial cable and twisted pair wires as well as fiber optics.
The reason for my research is that, as a fiber optic cable splicing technician, I learned things about light that was important to my job. Lasers are not polarized. The pulses that travel down a light wave guide (core) will “smear” based on the polarization mode of the pulse. When one mode of the light travels faster than the other mode of that light, different pulses will begin to overlap by the time they reach a receiver. Polarization Mode Dispersion was not an issue when bandwidth was much lower in early fiber optic communications. The pulses were longer and more spread out. It was like talking the same rate as somebody could listen. Processing each word could be done linearly and distinctly. However, as bandwidth goes up, pulses and time time between pulses go down..
My theory is that a crystal can be inserted after a transceiver that can generate two distinct pulses at different polarization modes. And two receivers at the other end can process two completely different signals from the same exact frequency on the exact same fiber. Moreover, applying this concept to other modes than just the vertical and horizontal mode can provide even more modes for distinct channels.
We can already cram dozens of different “colors” of light on the same fiber for dense wave communications, but imagining doubling, quadrupling, or increasing each frequency 16x or 32x times.
A single fiber could carry far more information that it currently can without being limited by frequency. Transmission of signal is limited by the wavelength of the carrier wave. You need a whole wave to distinguish between “on” and “off” and light used in fiber optics has a finite wavelength. We have remedied that limitation by utilizing different frequencies. Next we work on different modes.
Perhaps you can do your next video showing how you can transmit one picture using light polarized in one direction and another picture using light polarized in another direction. Then, you rotate a polarizer to reveal one picture or another.
Basically a guess, but, to your last point, it seems like the only way polarizing the light would create different colors is if the source light was made up of certain colored light with certain polarizations. I would want to test with different light sources and see the differences.
Are you using fluorescent light?
Great video by the way, had me laughing :)
Hey +Eric Mickelsen ! I was wondering if the lights of different wavelengths undergo polarization differently (as in the case of difference in refractive index from red to blue thereby different polarizing angles), that might be the reason for obtaining single color only for a certain configuration at the end of the vid.
I am really intrigued by polarization, and your video was cool!
The different colors we can see because it passes only one wavelength of light and blocks all other!!!? May be color depends on which type of polariser is it, as the experiment shown here in oven?
Hey Mr. Owl, how many licks does it take to get to the center of a tootsie pop?
+Josh Krisko 1, 2, 3... 3.
Right, and the higgs boson met the quaternium isotope in a bar somewhere, Wi-Phy.
So, I only saw one demonstration of a polarizer, and it was pretty cool.
But you didn't really explain how it works, you only explained how the physics behind light works.
Could you demonstrate what a polarizer IS?
Like...what does it look like, up close?
A bunch of lines across a film?
Isn't that more like, a dimmer?
That's exactly what it is. They will look different up close depending how they are made. But they are literally just microscopic, parallel wires. goo.gl/images/YcDcxW
@@EricMickelsen Wow. A poster that actually responds. That, is truly new to me. Thank you.
But, I do then, Mr Know-It-All, have a few more questions.
What's the distance between these lines? I can't help but visualize them as microscopic "shades" or "blinds."
Does this matter? How does it affect the EM wave? Too short in blocks all the light, not short enough, it doesn't do much of anything in terms of ensuring "uniform orientation of the waveform."
That doesn't explain the phenomena th-cam.com/video/gP751qpm4n4/w-d-xo.html @ 4:30.
I'm really trying to figure out the "quantum physics" here.
I don't know the precise relationship, but the distance between lines needs to be in the same ballpark as the wavelength of the light. Thickness may also matter a bit, but barely. Think of it this way: electrons can move on these "wires" in one axis, so they can make an electromagnetic wave in that polarization. The motion of the electrons is induced by the light itself, and the electromagnetic wave produced by that election motion gets added into the light. The wires need to constrain the electrons to move in that one axis, and they need to be able to move roughly a wavelength in that axis, but not the other axes.
The weird brightening quantum effect comes in because the electrons in multiple filters and the light itself have quantum properties that interact and form a wave function that is not observed or collapsed until the photon is absorbed by the camera or eye.
how does it works with 3d polorised glasses and is one glass different from other....
Shubham Patil the lenses in most modern 3D glasses are out of phase.
Brilliant video, thanks Eric!
I would posit that the universe is actually made out of ~ ＷＡＶＥＳ ＯＦ ＶＡＰＯＲ ~
Wow, I actually understood that! Thank you, and awesome video!!
damn bro, I learned much better from your video than my school
the part after the 10th minute is really interesting
Could this mysterious phenomena possibly the IR sensor in the camera lense?
11:55 What's happening is that the wave lengths are changing from 400 to 700nm. lol
True, but why? And why is the red so light and the blue so deep?
I don't know :) Do you know?
+Todd Gobbett I have a hypothesis. I'm waiting to see what other people think in case there's a better idea out there. I like Lily's idea about the different amounts of refraction for different colors - I hadn't really thought about that - but I haven't found any way to turn that effect into a solution, so I still like my secret theory the best.
Very Good Explanation
I wanna know how u actually make the lense polarized like How could u make it yourself
Why this guy has few suscribers? Send 1 million suscribers please!
I like field quanta tacos too!
Awesome ....i hve cleared the topic ....its really nice....thanks ser