Refraction Explained

How does refraction work? Why does an an object appear to change shape in water?

[karinamatos]

Speechless. 50% of my physics class in 4 minutes! Great job Woooowww!!!!

[PouyaLucky]

WOW ... This is explained so nicely and clearly ! I wish I had access to this growing up, the confusing math and physics and science could have been really awesome and fun sessions ... I guess the kids today are lucky in that sense ... Keep up the great work and thanks

[terryfries]

Simply Magnificent, during classes of Physics and Science I paid little to no attention due to my lack of sleep and teachers that lacked the enthusiasm to help me find the passion for it but this video just hits the dopamine for information collected online

[shayaandanish]

Great content. Really don't understand why more people don't watch this stuff. You never really completely understand science at high school level and I for one really need these kinda videos to help.
Thanks man

[KavyaCeleste]

I didn’t understand this in school but thank you for this video! It helped me understand way better and now I think I’ll be fine in the test I have coming up soon.

[neolicemarieatillo]

Thank you so much! All of the other videos immediately jump into the formulas and the others doesn't even scratch the surface of refraction. This video helped me so much. Thank you! I do hope you make a video about the laws of refraction soon. I really love the way you explained this. Thank you again!

[GelertTierney]

am a science teacher and my students find your videos very usefull

[SimulatingPhysics]

For the ones curious, I leave here a explanation of why refraction happens:
(It can be explained as a consequence of conservation of momentum of photons)

If in medium 1 the index of refraction is n1 and in medium 2 the index of refraction is n2 and for the definition of index of refractions and wavelength we have:
n1 = c / v1 , v1 = λ1 * f
n2 = c / v2 , v2 = λ2 * f

Dividing the above equations we obtain: n2 / n1 = λ1 /λ2
So if n2 is higher than n1, the wavelength in medium 2 is smaller than in medium 1.

Now because the photon momentum is: p = h / λ
Applying the conservation of momentum of the incident and transmitted photon along the parallel line of medium separation:

p1 = p2 → h/λ1 *sin(θ1) = h/λ2 *sin(θ2) → n1 *sin(θ1) = n2 *sin(θ2)

This is the Snell Law!!
So the light bending is just a consequence of the conservation of momentum of photons!

[anekashah]

Woah this is too good! Thank you so much!!!! The best video on this subject so far, a comprehensive, and well-explained introduction with amazing animation! Absolutely brilliant! Thank you for all that you do, it is very much appreciated. Got that "ah, I see!" moment finally.

[knuxuki]

I love how you explained and demonstrated how things work, really cool

[GelertTierney]

this helped me explain refraction perfectly to my students great explanation

[snehamourya]

Best explanation of refraction of light ever!

[durosebuild]

pov: you're in an online lessons and your science teacher sent you here

[nolanmcgovern]

Wow thank you so much your car explanation was genius and really helpful to me thank you so much!

[LFSPharaoh]

4:09 man that is so cool. Like sure we all know how a lens works, but to see it so concretely like that is so amazing. Great video.

[hvnxxo]

the analogy with the car definetly helped me understand this a lot better! thank you for the VISUAL this video is awesome

[hoofheartedicemelted]

Yes I have to admit, this, was good. Even I could understand it and that's not an easy thing to achieve. You have a new Subscriber sir. Thank you.

[mrhansen-physicsdemos.]

another excellent video by Science Sauce!!!

[ThanoSalt]

Ahh finally i wasn't in on school at the day i was supposed to learn this. Now i can start 8th grade easily with no concern :D

[thatwolfyouknow]

Amazing. Subscribed based on this video alone. Thank you!