Specular and diffuse reflection | Geometric optics | Physics | Khan Academy

Specular and Diffuse Reflection. Created by Sal Khan.

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[fleshcookie]

"were going to reflect on reflection"... Sal slays me.

[isaac_buckley]

Did anyone else's college just link them to this video in its class materials? Not that I'm not happy to hear Sal Khan again, I had like immediate homeschooling nostalgia. Thank you for all that you do, Mr. Khan! You've made the world a lot smarter.
Fun fact: That picture is of Mt. Hood over Mirror Lake! I used to live about fifteen minutes down the road from where the trail to the lake starts, it's a really beautiful area.

[leoscarpolinonly]

Got it! I love doing interesting and new things in the bathroom.

[Marscmet]

6:14 "it's a pretty interesting thing to do if you are looking for things to do in the bathroom" LOL

[skadogg]

Awesome video! i just finished my optics course :)

[motorburguer]

serio, muito bom a explicação, choquei em saber que é conteúdo estrangeira, e dublado que vi no site, muito bom, entendi muito bem neste video, o que nao encontrei informações de outras pessoas!! SHOWW!!

[trailertrashtactics]

"It's a great thing to do, for those of you looking for something to do in the bathroom" 😂😂

[Manwithsteelnerves]

just a small suggestion- Law of reflection holds even in Diffuse reflection.In Diffuse Reflection, the light scatters in different orientations because the surface of the underlying object will be not uniform.Pls correct me if im wrong. "Law of relection" holds for any light ray!

[nicholaszhu]

Lets get it BASIS only videos for physics

[AccuphaseMan]

@ 6:20 "if you're thinking of things to do in the bathroom" ...

[SupaPoopaScoopa]

Weird question, if you surrounded a perfect chrome ball with a 1 way mirror that was sided to only let light in and not let it escape, would the chrome ball look uni formally black with no form?
Strange thought that started with thinking how the predator displacement camouflage might would work. :p

[udayammanikumaran]

no doctor... still u have to analyze this curd, my chemistry mam asked us to avoid packet curd

[blackroze]

A ray of light strikes a mirror at an angle of 60 to the normal. the mirror is then rotated 18 clockwise. what is the angle that the reflected ray makes with the mirror ?
would some explain please :3

[michaelhunter]

It seems to me you described specular reflections from a smooth surface vs specular reflections from a rough surface.

What happens on the molecular level? I'm a molecule struck by a photon. I would have to know the angle of the light relative to the surface I'm part of and shoot off a photon in a corresponding direction. How do I know all that? What's my motivation for following this scientific rule?

[superdau]

Small correction: for the double reflection, the first point of reflection is not the same as for the single reflection. Because if it were, it would hit our eyes directly and could not go to the paddle.

[LAnonHubbard]

Very nice video. It's great to get the terminology down.

[leekelly]

"It's a pretty interesting thing to do if you're looking for things to do in the bathroom"! haha :)

[hedonism]

@blackroze1000
An angle of 78. If the ray of light is stationary, but the surface it is reflecting off of is moving clockwise, then the angle it forms with the normal (the line 90 to the surface) is getting larger, in this case by 18. So the angle of incidence is 60+18=78. Since the angle of incidence is equal to the angle of reflection, it reflects at an angle of 78.
I know you asked a month ago and probably don't need the answer, it's still good to know.

[hachemelouggouti]

I was wondering, and my question is quite general, how can different lenses with different focal lengths, or a zoomlens, produce an image of the same dimensions? After all, the field of view represents how wide the scene is that we capture, and a smaller part takes less space than a larger part? So, how do they do it?

[hedonism]

@ElisHong
A reading, from the book of Physics, Chapter 135, verses 6:14 - 6:18.
"It's a pretty interesting thing to do if you're looking for things to do in the bathroom."