Laser Diffraction and Interference
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- เผยแพร่เมื่อ 27 ส.ค. 2024
- A laser is directed at an adjustable single slit and then a pinhole and the resulting diffraction patterns can be seen on a screen.
A laser directed at two slits spaced closely next to each other creates an interference pattern within the diffraction pattern. Shining lasers of different wavelength light shows how the wavelength affects the interference and diffraction patterns.
Thank you for putting this on youtube. It really helped me. Appreciate it.
This is by far the best display of the slit experiments. The only weakness was that the pinhole experiment was only shown with one size pinhole, whereas at the very least they should have shown the control dot without any pinhole.
If you assume the red laser is He-Ne at 632.8 nm wavelength, you can use the double slit diffraction equation to estimate the wavelength of the orange and green lasers. I got 514 nm for the green laser and 610 nm for orange.
Thanks, YT algorithm for this I have to study Wave optics and it helped
Wow! MIT is the best. I have watched many of your videos, all excellent. Not a word was spoken, but a ton of info was given and made understandable to the average person. Thank you.
Yes, I can agree to that.
This is what I'm searching for.. Gracias !
Looks like a rising and setting sun!
Partially due to the same reason
The single slit seems to show interference pattern to, is that supposed to happen? Why?
best visual demo I have seen :)
This is so so awesome!! Thank you so much for this video!!!
And what happens when you use a polarized laser in a direction that is perpndicular to the slit
it's pretty cool omg😮
Thank You!
Wow ! It's amazing 👀❤❤
Excellent presentation in the far field scenario. Can you make one for the near field as well please?
I did this at home with all my lasers. Got the same result it was crazy
But last one is diffraction, inside the diffraction peak interference pattern are visible, and in interference all dark and white fringes are of equal size. I am confusing with last one.
Thanks a lot, helped me a lot
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bruhh
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Does the green pattern looks shorter in the middle because of the shorter wavelength?
That would be my guess, but I'm no scientist. I just find this stuff fascinating.
Me neither. I just love learning physics! 😁
That's exactly right. Look up the double slit interference equation and you'll see that the angle of spread is proportional to the wavelength. This holds true for the single slit as well. The double slit causes the small fringe lines to appear within the single slit envelope.
beautiful
Now all doubt is gone
very best sir please upload more experiment videos
beauty of physix ......in a word osum vid
When we do a single slit experiment with white light you get a diffraction grating (a colored sprectra is observed simetrically on both sides of a central white band. If white light is composed of waves of different lengths: why the longest (less energy) waves appear always in the periphery whereas shortest (more energy) in the centre?
check the result it is directly proportional to wavelength
Thanks, that was cool!
Did you do this at uni?
Im a little confused I thought it was only supposed to have two areas of light intensity when the double slit is observed but here I'm seeing a diffraction pattern thats only supposed to happen when there is no observer.
These effects are not really dependent on the observer. When you have two slits there will be interference due to the different path lengths for light coming from each of the slits to the screen. But there will also be diffraction due to the finite size of each slit.
The resulting pattern is called interference modulated by diffraction.
allan J Think of throwing a ball at water, whether it's one or two there well be waves, waves being what you are seing onthe wall. Generally you are seeing waves in the "absence" of solid matter and particles when it hits solid matter. But this lets you see the wave form instead, showing how unpredictable everything we know about science really is.
That is so cool!!
Awesome !
Can i use you video to my student im from morroco
C'mon man!
It's ok.
Why would he mind, tho!
this is awesome
Cool! Thanks a lot^^
Can someone pls tell me the difference bw interference and diffraction?
Maybe in this case...diffraction is when on a slit is used and interference is when more than a slit are used..
I thougt this was channnel of
Two side gamers
So, is the wave-particle duality debunked?
So basically, if I don't check the oil and other fluid levels on my car, change the air filter, and wipe the dust off the valve cover, the particles that make up the engine will turn into a wave form and break down...
Fuck, I can't understand how this is physically possible. I can't believe all we can do is just set this up turn it on and then just stare at the wall completely dumbfounded. When what's happening is literally happening right in front of our faces with us watching it happen and we still can't comprehend what's happening just by looking at it. I feel so defeated. The answers are all right there and yet we just look at it with no idea.
Nice has anyone filmed diffraction in real not on the board in the air etc ?
rainbowunicornfart123 We have a video where diffraction is filmed in the air here: /watch?v=E-3uht9LAhM
if slit width increases the diffraction takes place ..can u explain it
teja swi diffraction will take place but it will be less pronounced.remember for a good diffraction pattern we should have slit width equal to wavelengths of light
Why intensities are different in double slit expmt??
different color light has different wavelength, descending from red to purple as rainbow
Khmer kernh like 1
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koul