Question

Prove the following statement.
If the angle of incidence and angle of emergence of a light ray falling on a glass
slab are i and e respectively. Prove that i = e.

Answer 1

Sin i / sin r = RE (RE = refractive index)

And, Sin r/ sin e = 1 / RE

So, Sin e / sin r = 'RE

= sin I /sin r = sin e / sin r

= sin I = sin e

= I = r

Hence proved

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