What is Refraction? 

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!

thankyou, my book wasn't explaining it well and this helped!

This video was amazing like omg the greatest this since the toaster

It's short but explained a big concept .. That was a great help . Thanks !

sick vid bro, great entertainment

excellent it helped me alot

OUTSTANDING

Very nice Explanation.. Thanks..

This makes so much sense

thanks!

Amazing

Thank you

there is a mistake as shown in the video the speed of the light decline to 200,000km per secs but while calculating the refractive index of glass the have taken the speed as 225.000 km per secs

Thanks

Super simplified

I wish I could.give a thousand

hi

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I think we all know that only students are watching this rn

Did not help at all