Nice video! Just a note, the RGB thing is about *our perception,* not "the nature of light itself". Adding red, green, and blue into a single stream of light, does *NOT* repeat *NOT* 'make white light', it is simply "how humans see light", so it only looks white *TO US*, but to many other sorts of organisms we may look dimly lit or even unlit under an "RGB White" illumination, whereas a 'natural white' (as our matching of sunlight is called, and as 'color index rating' or 'CRI value' refers to the % accuracy of) has individual photons of the whole range from near infrared to near ultraviolet. To us, the two look indistinguishable, but they are not the same thing.
Stephen Ball It means that bodies don’t emit much high energy radiation because they don’t have enough energy to do so. Most bodies emit most of their radiation infrared radiation.
I have a question. If you fire a single photon onto a piece of plastic in space, would different observers at different locations be able to see it's impact? If so, does the photon split up in billions of different photons, some of which are received by the eyes of the observers?
Kristian Mooney According to my GCSE teacher they will still travel at the same speed but they travel a longer distance because they bounce off other particles. Therefore making the time longer but the speed constant.
ever thought about making a patreon page or similar for donations, means those that want see more can and those that cant afford it are still able to access it, just and idea, great videos though.
Quanta is the plural form of quantum. A quantum being the smallest 'component' of anything. In other words, you cannot have half a photon, the photon is the smallest component of light (or electromagnetic radiation to be more precise). So to answer your question; a photon is the quantum of light, but you could also say that photons (plural) are the quanta of light.
Quanta is an airline out of Australia. Also, the airline has very small planes. And photons is the gangsta way to say 4 tons. For example, the gansta way to say 'fifty' is 'fiddy'. Got it?
So white light is a combination of a stream of RGB photons or they combine to form one thing? I find this wave/particle property of light still difficult to understand.
Images could be the vehicle of the quantum photons medium to understand us. As energy is created, vision creates frequency, and a pocket of information is displayed on the watercolor.
what the meaning of more or less energy its means that the particles are bigger and smaller or it means that happen more or less often? besides how its posible that soething that has energy doesnt has mass doesnt suppose to be the kind it the same (mass/energy)?
Why does the textbook say electrons in an atom only 'absorb' photons of a particular wavelength. Can't it not just absorb every single photon with a greater energy above the principle one? I noticed the black-body curve looks like the curve for resonance for intensity against frequency. Are these too linked? It will still absorb photons above the principle but not as much as the resonant frequency photon?
you have such amazing videos. i tried looking at some of your year 13 videos but it says its not available your country.can't you do something about that
+Isatou Bah I'm looking into a way to have another website with the Year 13 videos available for those who can't access the TH-cam paid channels due to the country where they live. But it won't be for a while I'm afraid. Any ideas or suggestions of other sites that have something similar?
If that would be the case then they wouldn't be traveling at the speed of light. Impossible. Even if you think about photons as electromagnetic waves. All you have is 2 fields having oscillations in them simultaneously. It's like saying water in a wave weighs more than the water thats not in a wave.
despite of a popular belief, i have no idea how planck's got his h. Einstein method is crystal cear to me E - Eo = h f, an electron escapes with the energy h f, the simple slope is THE h, therefore a photon itself is quantized. but in planck method... i really have no idea... the impression i got from Einstein's words on planck was like, planck method was wrong, his derivation was wrong. just only his result was correct... i even tried to understand the vibrational modes of the molecules of the walls of the cavity in black body. if i use the bose-einstein statistics then i may be... but it is hard to see where the quntization is started. I dont care about the result, i like to know how he got it and got it quantized
hello I was wondering whether light had memory like a record can be imprinted with sound, if light is imprinted in a like manner after all it is not the object you are seeing but the light reflecting off of that object that you actually see. and if that imprint would be permeate, or would it be able to record in a layering effect retaining each reflection as it travels on it's journey. or is it just rewritten each reflection. also since light is made up of all light spectrums and the thought is that photons have a chemical reaction going on weather the colors we actually see are in fact that color or is it a combination of two colors producing a third color being the color we see. two chemical reactions producing the color change effect. also if this is not the proper forum for this discussion could you or anyone direct me to an appropriate forum.
I made everything for AS Physics free, but I did make the decision to charge a small amount for the Year 13 videos to allow me to keep making videos. I've made them all completely on my own and they do take a lot of time (and money) to create.
"Einstein's Mistake?" In 1917, when Albert Einstein (1879 -1995) set out to describe the Universe mathematically, he included a "cosmological constant" - an outward force to prevent the Universe from collapsing. At the time he did not know that the cosmos is in fact expanding. His "mistaken" idea has recently been recieved with the concept of dark energy.
+Edward Lucas Well spotted, I even tried to match the Lego to the intensities of the real stars. I once spent many months sleeping outside in the desert and that was the one constellation that I saw every night and could recognise!
Your video was awesome, and every helpful, though you said that being that a photon has a mass of 0 it can ONLY travel at the speed of light. I have seen a video where a group of scientists slowed down light, so how is that posible?
I believe when he says that, there is an implicit "in a vacuum" - something with a mass of 0 can only travel at the speed of light in a vacuum (eg in space). Light slows down ever so slightly when travelling through air, and quite a lot when travelling through water or glass or other similar materials, causing refraction and other phenomena.
I still don’t get it!! If the photons does note make up the wave, and the wave is not “inside” of the photon, otherwise we would have city sized photons, whats is the wave then?? What’s wavering??
Photons don't travel. You were just being given the same old false explanation that started with a careless sentence of Einstein's in his 1905 paper on the photoelectric effect and that people keep repeating over and over, again, without thinking about it for even a minute.
Mohammad Ali You're correct that when an object approaches the speed of light its mass does increase, but that is only for objects that have a mass to begin with. For example, an electron has a rest mass of 9.11 x 10^-31kg, but when its speed approaches c it will get heavier, in fact it can never get to the speed of light because as you give it more energy this only increases its mass not its velocity. But photons start off with zero mass - some objects have mass, some don't. Some are charged, some aren't etc.
Hello sir, I would love to subscribe and pay for your year 13 channel, however it's not available in my country, so i wanted to ask whether this playlist is enough to make me understand the chapter quantum physics from the A2 syllabus ? Thank you. :)
you said photons...how??? A photon is precision engineering at its finest...what factory is out there that can produce so many identical photon??? The answer is no factory. You may want to rethink
The truth is a photon is just a mathematical particle because Einstein's principal skill was imagination. Electromagnetic energy is oscillations in magnetic field. The smallest oscillation is *one wave* The amplitude of 'waves' can also be increased, which is how AM radio works, (Amplitude Modulation) Below 2 MHz radio waves are diffracted (bent) by the magnetic field of the Earth. (Converting into mathematical particle photons is really unnecessary = time consuming.) But plenty of professors have gotten plenty of time 2pac out! Light is electromagnetic oscillations at 430 trillion hertz - 770 THz (not three different coloured little balls) Example:If you have a 1watt transmitter you could divide Watts by 3600 to make it Watts per second to do the Maths with Hz (oscillations per second) of your transmitter whether it was single frequency LED light or a radio frequency used by your Smartphone phone, to find out what energy in watts your mystical mathematical particle has! But hay, manufacturers can make Smartphones, using quantum mechanics, with several different electromagnetic transmitters from Bluetooth to Wi-Fi to HD screen, without using photons in the calculations!
Ummm, I don't think that is what really is happening. I can't really explain it. If an object was energized to produce light, that light travels in many directions at the same time, think; an aerial bomb blast like one sees in the movies, just a small thing like a spark would mean trillions of "packets" leaving omnidirectionally at the same time some of those packets not stopping until they reach Alpha Centauri or farther. I don't think we know just what it is yet.
Lost at second :29. Geez. Stop, stop! How can light be affected by gravity if mass is truly 0? Shouldn't all of this have the caveat... "according to current understanding?"
@@schmetterling4477 Easier to divide the energy of the gamma ray photon by its frequency and next divide the energy of the radio wave photon by its frequency. The answer is Planck constant. Thanks 🌹🌹
+jakeflow27 If you understand light truly then you realise it isn't exactly a wave and it isn't exactly a particle. It is both and neither, light can only really be expressed mathematically but we use models in science to explain (and understand) the behaviour of the world around us. Think of light travelling like a wave and interacting like a particle and that will help.
you said photons...how??? A photon is precision engineering at its finest...what factory is out there that can produce so many identical photon??? The answer is no factory. You may want to rethink
I HAVE EXAM IN 4 HOURS AND U JUST SAVED MY GRADE
Astatonic good luck
thank you and paper went well :D
@@astatonic4626 what grade did you get?
@@rafestratton8019 it’s been three years I don’t think they will be looking at a TH-cam comment
@@astatonic4626 what grade!?
Your videos are always helpful. I appreciate your use of props in your videos. I can't learn well without them.
Using LEGO bricks? Brilliant! Very good quality video!!
I am amazed that a photon travelled millions of years just to reach me, I feel blessed
Nice pen
Indeed, nice pen!
Just what I commented :)
Wtf
Nice video! Just a note, the RGB thing is about *our perception,* not "the nature of light itself". Adding red, green, and blue into a single stream of light, does *NOT* repeat *NOT* 'make white light', it is simply "how humans see light", so it only looks white *TO US*, but to many other sorts of organisms we may look dimly lit or even unlit under an "RGB White" illumination, whereas a 'natural white' (as our matching of sunlight is called, and as 'color index rating' or 'CRI value' refers to the % accuracy of) has individual photons of the whole range from near infrared to near ultraviolet. To us, the two look indistinguishable, but they are not the same thing.
So some of the stars we see now are already dead , the more distance the older it is wow , it's actually amazing it u think of it
We're not seeing the Universe now, everything we see is in the past - it also takes your brain a short amount of time to process the visual signals!
Awesome
thankyou! that was very neat . i was really confused about how the atomic spectrum worked this cleared things up!
please make a video explaining "Band Theory" too..it's newly added in the syllabus for 2016. MUCH appreciated, thanks!
Sir I am ur fan plz autograph
u have got an inborn talent of explaining well
Great video man. Thank you
Why does the diagram at 1:15 show a bell curve? Does that mean green is the most energetic color of light?
Stephen Ball It means that bodies don’t emit much high energy radiation because they don’t have enough energy to do so. Most bodies emit most of their radiation infrared radiation.
I have a question.
If you fire a single photon onto a piece of plastic in space, would different observers at different locations be able to see it's impact?
If so, does the photon split up in billions of different photons, some of which are received by the eyes of the observers?
Great vid. Nice pen too!
Question - regarding EMF, which energy source produces the photon, electricity or magnetism?
you taught me more in 4 minutes than my teacher can in 2 hours... 😂
I'm sure your teacher is doing a good job - it's not easy! But thanks for your comment, really appreciated.
Kristian Mooney According to my GCSE teacher they will still travel at the same speed but they travel a longer distance because they bounce off other particles. Therefore making the time longer but the speed constant.
4:12 CRAZY, and cool!
ever thought about making a patreon page or similar for donations, means those that want see more can and those that cant afford it are still able to access it, just and idea, great videos though.
What exactly is the difference between photons and quanta?
Quanta is the plural form of quantum. A quantum being the smallest 'component' of anything. In other words, you cannot have half a photon, the photon is the smallest component of light (or electromagnetic radiation to be more precise). So to answer your question; a photon is the quantum of light, but you could also say that photons (plural) are the quanta of light.
Quanta is an airline out of Australia. Also, the airline has very small planes.
And photons is the gangsta way to say 4 tons.
For example, the gansta way to say 'fifty' is 'fiddy'.
Got it?
@@cj2378 yeah, i ain't got no tree fiddy, "And photons is the gangsta way to say 4 tons.", that's inspired.
So white light is a combination of a stream of RGB photons or they combine to form one thing? I find this wave/particle property of light still difficult to understand.
Images could be the vehicle of the quantum photons medium to understand us. As energy is created, vision creates frequency, and a pocket of information is displayed on the watercolor.
Great video!
pretty awesome video! this explains a lot!
what the meaning of more or less energy its means that the particles are bigger and smaller or it means that happen more or less often? besides how its posible that soething that has energy doesnt has mass doesnt suppose to be the kind it the same (mass/energy)?
0:15 anyone else notice the spelling mistake - QUAUTUM, lol love your videos btw
That's 'n'
Does it mean that photons act as waves ??? Is H constant plunck means the lowerest energy of a photon ?? thank you
Anyone else notice how smooth that pen writes?
Is there a date of when it all started the 00:00:00 January 1 ?
I was wandering if you have any videos on Quarks and Leptons, and Matter and Radiation?
+Izzy Manuel Not yet but I will do - in the next few weeks hopefully.
+Izzy Manuel These videos are available now.
Hi bit confused are EM waves made up of photons or just photons are how they deliver energy
Photon= Light !" The secret of light " by Dr. Walter Russell...Quote :" In the wave lies the secret of creation " Thanks
Why does the textbook say electrons in an atom only 'absorb' photons of a particular wavelength. Can't it not just absorb every single photon with a greater energy above the principle one? I noticed the black-body curve looks like the curve for resonance for intensity against frequency. Are these too linked? It will still absorb photons above the principle but not as much as the resonant frequency photon?
An ambience for every occasion It has to be exactly the right amount.
great video
And there is another person on the internet who doesn't know what photons are but who is desperate to explain photons to you all. :-)
r u sure
@@nicoleortiz-vr4uo Yes. :-)
The graph at 1:20....must be wrong right?
I don't think so.
Since they all travel at the speed of light, what do we mean by a more energetic photon?
you have such amazing videos. i tried looking at some of your year 13 videos but it says its not available your country.can't you do something about that
+Isatou Bah I'm looking into a way to have another website with the Year 13 videos available for those who can't access the TH-cam paid channels due to the country where they live. But it won't be for a while I'm afraid. Any ideas or suggestions of other sites that have something similar?
+A Level Physics Online Vimeo? Daily Motion?
Photons do actually have mass; it's just that the mass of a single photon is so small, its almost unmeasurable.
If that would be the case then they wouldn't be traveling at the speed of light.
Impossible.
Even if you think about photons as electromagnetic waves. All you have is 2 fields having oscillations in them simultaneously. It's like saying water in a wave weighs more than the water thats not in a wave.
photons arent electrons
You are thinking of electrons. Photons have absolutely ZERO mass.
despite of a popular belief, i have no idea how planck's got his h. Einstein method is crystal cear to me E - Eo = h f, an electron escapes with the energy h f, the simple slope is THE h, therefore a photon itself is quantized.
but in planck method... i really have no idea... the impression i got from Einstein's words on planck was like, planck method was wrong, his derivation was wrong. just only his result was correct... i even tried to understand the vibrational modes of the molecules of the walls of the cavity in black body.
if i use the bose-einstein statistics then i may be... but it is hard to see where the quntization is started.
I dont care about the result, i like to know how he got it and got it quantized
hello I was wondering whether light had memory like a record can be imprinted with sound, if light is imprinted in a like manner after all it is not the object you are seeing but the light reflecting off of that object that you actually see. and if that imprint would be permeate, or would it be able to record in a layering effect retaining each reflection as it travels on it's journey. or is it just rewritten each reflection. also since light is made up of all light spectrums and the thought is that photons have a chemical reaction going on weather the colors we actually see are in fact that color or is it a combination of two colors producing a third color being the color we see. two chemical reactions producing the color change effect. also if this is not the proper forum for this discussion could you or anyone direct me to an appropriate forum.
why is ur videos free ? thanks a lot i thought a2 part is paid
I made everything for AS Physics free, but I did make the decision to charge a small amount for the Year 13 videos to allow me to keep making videos. I've made them all completely on my own and they do take a lot of time (and money) to create.
A Level Physics Online kindly make video on "band theory"
"Einstein's Mistake?"
In 1917, when Albert Einstein (1879 -1995) set out to describe the Universe mathematically, he included a "cosmological constant" - an outward force to prevent the Universe from collapsing. At the time he did not know that the cosmos is in fact expanding. His "mistaken" idea has recently been recieved with the concept of dark energy.
That constellation..was that Orion ??
+Edward Lucas Well spotted, I even tried to match the Lego to the intensities of the real stars. I once spent many months sleeping outside in the desert and that was the one constellation that I saw every night and could recognise!
Your video was awesome, and every helpful, though you said that being that a photon has a mass of 0 it can ONLY travel at the speed of light. I have seen a video where a group of scientists slowed down light, so how is that posible?
I believe when he says that, there is an implicit "in a vacuum" - something with a mass of 0 can only travel at the speed of light in a vacuum (eg in space). Light slows down ever so slightly when travelling through air, and quite a lot when travelling through water or glass or other similar materials, causing refraction and other phenomena.
thank you
is all of this OCR?
I still don’t get it!! If the photons does note make up the wave, and the wave is not “inside” of the photon, otherwise we would have city sized photons, whats is the wave then?? What’s wavering??
Why cant something without mass travel below the speed of light? I'm guessing this is special relativity related right?
Photons don't travel. You were just being given the same old false explanation that started with a careless sentence of Einstein's in his 1905 paper on the photoelectric effect and that people keep repeating over and over, again, without thinking about it for even a minute.
+A Level Physics Online doesn't the mass of an object increases as it approaches the speed of light. so the photon's have mass?
Mohammad Ali You're correct that when an object approaches the speed of light its mass does increase, but that is only for objects that have a mass to begin with. For example, an electron has a rest mass of 9.11 x 10^-31kg, but when its speed approaches c it will get heavier, in fact it can never get to the speed of light because as you give it more energy this only increases its mass not its velocity. But photons start off with zero mass - some objects have mass, some don't. Some are charged, some aren't etc.
A Level Physics Online Thanks, that really clears things.
A Level Physics Online Do u have the ocr 2014 past papers?
A photon is any pack of energy With A charge of O. Spin of 1 With two possible orientations and a rest mass of 0...Pretty simple really
Hello sir, I would love to subscribe and pay for your year 13 channel, however it's not available in my country, so i wanted to ask whether this playlist is enough to make me understand the chapter quantum physics from the A2 syllabus ? Thank you. :)
basmah It should be. The paid channel is just for the year 13 content.
so if the star is dead ¿when will we stop reciving its lights?
I misunderstand; if gamma particles have mass, then they're definitely not photons, so why did you say they were?
waves
Those aren't photons! Those are Legos!
:-D
Photons give the world RTX.
Ah yes, 'Quautum' physics
Quanta of light : photon
you said photons...how???
A photon is precision engineering at its finest...what factory is out there that can produce so many identical photon???
The answer is no factory. You may want to rethink
Dude, what?
The truth is a photon is just a mathematical particle because Einstein's principal skill was imagination. Electromagnetic energy is oscillations in magnetic field. The smallest oscillation is *one wave* The amplitude of 'waves' can also be increased, which is how AM radio works, (Amplitude Modulation) Below 2 MHz radio waves are diffracted (bent) by the magnetic field of the Earth. (Converting into mathematical particle photons is really unnecessary = time consuming.) But plenty of professors have gotten plenty of time 2pac out!
Light is electromagnetic oscillations at 430 trillion hertz - 770 THz (not three different coloured little balls)
Example:If you have a 1watt transmitter you could divide Watts by 3600 to make it Watts per second to do the Maths with Hz (oscillations per second) of your transmitter whether it was single frequency LED light or a radio frequency used by your Smartphone phone, to find out what energy in watts your mystical mathematical particle has!
But hay, manufacturers can make Smartphones, using quantum mechanics, with several different electromagnetic transmitters from Bluetooth to Wi-Fi to HD screen, without using photons in the calculations!
Ummm, I don't think that is what really is happening. I can't really explain it. If an object was energized to produce light, that light travels in many directions at the same time, think; an aerial bomb blast like one sees in the movies, just a small thing like a spark would mean trillions of "packets" leaving omnidirectionally at the same time some of those packets not stopping until they reach Alpha Centauri or farther. I don't think we know just what it is yet.
Radio waves are longgg bois
Lost at second :29. Geez. Stop, stop! How can light be affected by gravity if mass is truly 0? Shouldn't all of this have the caveat... "according to current understanding?"
No. You can find the reasons in every textbook on general relativity.
I dont even do physics 0_o
So there are different types of photons? Hmm.
No.
Taking one radio wave photon and comparing its energy to one gamma ray photon, we find the energy is the same. Right?
No.
@@schmetterling4477 Be good if the answer, No or Yes, could be proved using mathematics and physics. OK👌.
@@solapowsj25 Sure. The photoelectric effect will do that nicely for you, so will bolometry for low energy and calorimetry for high energy quanta.
@@schmetterling4477 Easier to divide the energy of the gamma ray photon by its frequency and next divide the energy of the radio wave photon by its frequency.
The answer is Planck constant.
Thanks 🌹🌹
quauta
You lost me at Neuton
You are great sir
Please speak slow
What exactly is a photon? A word made up for persons that don't understand what light is
+jakeflow27 If you understand light truly then you realise it isn't exactly a wave and it isn't exactly a particle. It is both and neither, light can only really be expressed mathematically but we use models in science to explain (and understand) the behaviour of the world around us. Think of light travelling like a wave and interacting like a particle and that will help.
Photons don't travel for millions of years across the universe, they travel instantly in their own time reference.
Thomas Drowry Yes but only in their own frame of reference.
Good at Physics but can't spell.
No, he's not even good at physics, I am afraid.
The creation of the Lord is wonderful and amazing right. Amen.
you said photons...how???
A photon is precision engineering at its finest...what factory is out there that can produce so many identical photon???
The answer is no factory. You may want to rethink