Wednesday, April 12, 2017

optics - Why does light refract?


I had read that light does slow down in glass because photons interact with atoms in glass. They are absorbed and re-emitted and during this phenomenon it's speed decreases. See also this and this Phys.SE post and links therein.


But then why does it bend? It has confused me a lot! Furthermore i have very little knowledge of Optics or Physics as a whole.





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