So helpful, but never heard anyone say shoot that much.

@chess1011

3 жыл бұрын

😂

@toadsage2797

3 жыл бұрын

So immersed didn't even notice lol

@faik_xdeditz3909

Жыл бұрын

That's the best part

6 years old and this video still just saved me so much time and frustration. You guys are amazing at breaking things down sequentially, thanks a ton!

@chikanma5021

3 жыл бұрын

Facts

@JasonVaysberg

3 жыл бұрын

I thought you were bragging about learning this at 6 years of age at first lmao

@DrBoritoLOL

7 ай бұрын

Now it's 9 🎉

shoot, this was very helpful. Thank you!

After watching lots of other videos I still didnt understand but after watching both parts of Mr khan, I am understanding concepts much better. Thank you and worth my subscribe click. Cheers.

Shoot, you were the best teacher ever! Amazing work!

@somirandutta5436

Жыл бұрын

😂

The two videos were so well explained and helpful. Thank you so much !!

My professor states that delta L=2t - (1/2) λfilm for constructive interference and delta L=2t + (1/2) λfilm for destructive interference. Thus, 2t= λ(m+ 1/2) for constructive interference and 2t= mλ for destructive interference. You explained all of the other concepts correctly, you didn't state that delta L doesn't necessarily equal 2t.

@mfadhilal-fatih1427

4 жыл бұрын

The lamda is becoming +π is because the wave is flipped over not because moved to front i think. Thus, if it is because it moved to front we can just approximate it like sin tetha aproximate tetha approximate tangent tetha

@sidratulmuntahaprapti9698

2 жыл бұрын

I've also read it somewhere.. 😐😐

the best video on basic thin film interference

Legend He started of by saying "what do we know... nahhh what we are going to figure it out" to "what do we know" Believe me the satisfaction is priceless ✨

Only place where you can find this so clear! Congrats on discovering this.

You're the best teacher ever

What if the thickness and the n of the media are given and then you're asked to determine if it's constructive or destructive interference?

This was a very good explanation thanks, I understood every thing about thin film interference

For index of refraction and velocities, I think it might be helpful to just use: n2/n1 = v1/v2 = wavelength1/wavelength2

Thanks a lot for so much simplification

Could you also do a video on the interference of a wedged shape film

Can you just explain the path difference in the case of an inclined ray of light falling on the thin film?

thank you so much for this video a lot of help ❤

Thankyou so much ♥

Well shooooot

I love you khanacademy😍

or u could substitute n= lamda in air over lamda in medium, and get 2nt=m(lamda) or m-1/2 (lamda) where the wavelenth is just the wavelength in air, if density is given

I like the way u teach.it it's not mundane

Thank you so much

your videos are good btw

He sure shoots a lot

Thank you :)

Thank you soo much!!

why do we see different colours during thin film interference like when oil is on water during a rainy day?

@iWatchFromBehind

5 жыл бұрын

varying thicknesses of the film over the surface of the water

@wolfie6175

5 жыл бұрын

Saimul Islam You are right that the physical distance changes. . But the frequency doesnt change no matter what. Its actually the interference that changes from constructive to destructive or vice versa for certain colors depending upon their wavelength wrt the change in the physical distance.

Amazing explanation are there more videos with this guy?

Thanks it was very helpful

Thank you very much!!!

Isn't this only the case when light hits the film perpendicular, when it isn't like that the distance differance should be like sin(a)*2d, right?

Khan academy is nest

@pranshkhubchandani8102

6 жыл бұрын

Best

Thank you!

What`s the difference between "v" and "c"? Thanks a lot for this helpful video!

@linjiewang5653

3 жыл бұрын

This is the question confused me for a while too, so I don't want you to be confused. V is referring to the term "wave speed", most of things that we are dealing with are electromagnetic waves , such as radio waves, microwaves, infrared waves, X-rays, gamma rays, visible light, etc. The speed of these kinds of waves are what we called "the speed of the light." Therefore, in most of the cases, we can use "c" and "v" interchangeably because they are essentially the same thing with the same value. In the ideal situation, you can say that the speed of radio waves is 3 x 10^8 m/s, which is the exact same value as the speed of light. Hope that makes senses!

@debrachambers1304

Жыл бұрын

C is speed of light in a vacuum. Light changes speed when in a material. The speed in a given medium is v.

thank you!

Haha, love this video thanks!

I NEED THE DERIVATION WHY PATHDIFFERENCE WAS LAMBDA /2 ?????

Does any one know what causes the phase shift of 180 when light is reflected back from a denser medium?

@stauffap

7 жыл бұрын

Yes, you can find an explanation in one of Walter Lewins lectures (8.03, lecture 8). It starts at 55 Minutes into the lecture. That's not the explanation for light though. He shows what happens when a pulse on a string travels from a fast string to a slower string. It's the same concept for light though and it explains the phase shift. Now i don't know how advanced you are, but if you know how to deal with maxwells equations, then you can also go to 8.03, lecture 18, where he derives the fresnel equations, that explain the same thing for light.

@reetanshukumar1865

6 жыл бұрын

when light goes from low denser medium to high denser medium its speed slow down by a factor of its medium constant (n)..therefore light when travel back to low denser medium its has a phase difference compare to light reflected from rarer surface....

I think the total path difference will be 2ųt u being the u of the medium

Every time he says shoot I think he's about to say sheesh

How do you know how to find m?

@gabor6259

5 жыл бұрын

It's true for all m.

really helpful for someone who study at last minute ... just like me.... hahahaahahah

he knows how messy it is and it is confusing

shewt

Who else thought it was gonna end at 8:15?

"loogit" 0:00

Good explanation but the board is ridiculously crowded towards the end. It feels unorganized.

You say shoot a lot lmao

Who is watching in 2024?

shoot

Shooot

Thank You :)

shoot