Specular and diffuse reflection 2 | Geometric optics | Physics | Khan Academy

Specular and Diffuse Reflection 2. Created by Sal Khan.

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[oxXdesihijabiXxo]

you are REALLY good at drawing those faces!! (among other things, of course!)

[Matsebassen]

@SeagullDesign No, angle of reflection is always equal to the angle of incidence, even in diffuse reflection. The reason why you get diffuse reflection is that the apple's surface is not 100% smooth at a microscopic level. The surface is rough, so when the light rays hits the apple, they will be reflected in all directions. They always follow the law of reflection.

[mrplasticboii]

I like the fact that he writes with the writing pen instead of the mouse. (:
Nice Upgrade

[helenamaria]

Wonderful! Now I see where to put the highest point! Thanks so much! 🙏🙏🙏🙏🙏🙏

[worldaviationk]

Like a Laser Pointed onto a wall, the reflection doesn't move location on the wall wherever you stand? but if you could see the laser holder in a mirror or window his reflection would move but the laser point would stay in the same place?

[ajaykumarray]

Appreciation of the drawing skill 🔥🔥✅️✅️💯💯.
With amazing explanation

[LAnonHubbard]

Great video. It's fantastic to have a deeper understanding of the universe.

[stuffedk]

Mmm free knowledge, im loving it :D
Thanks Sal!

[jazerazo]

Good point, I hadn't noticed the mistake. Anyway, great video, as always.

[frankdoherty]

Sal isa Mozart of our time - a mashup in the works with brilliance

[hopolo]

3:12 wrong angles drawn for the reflected rays since you wrongly assumed the case for a flat reflector after you painstakingly redrew a curve.

[stanleycjohn]

"lets say this person is looking at this super ginormous apple now relative to him" hahahah

[SeagullDesign]

So in diffuse reflection, the angle of relfection is not equal to the angle of incidence? And the difference between the angle of incidence and reflection is related to the apple absorbing all of the visible specturm except for red (in the parts of the apple that are red), which is then reflected at a different angle than white light would be reflected?

[meherbanusyeda]

@ 5:18 why is the apple absorbing all parts of the spectrum except the red??

[rajivsaxena]

For formation of an image on retina is it important that the light rays meet

[PiDeeTronic.]

This guys insane at teaching and drawing faces

[_mrmatkar_]

Does the specular as well as diffuse reflection occur only for spherical objects?

[stackheap]

In your first video, you show that one incoming ray of light will result in one outgoing ray of light, but in this one you're saying that now an incoming ray of light can produce more than one outgoing ray of light because of the surface not being like a mirror?

[joeymatee]

a reflection on a reflection - refception

[hopolo]

4:34 mispronunciation of the word "specularly" try again