Question

A ray of light travelling in air falls on the suraface of ractanglular slab of a plastic material whose refractive index is 1.6 if the incident ray makes an angle of 53 with the normal .find the angle made by the refracted ray with the normal

Answer 1

A ray of light traveling in air falls on the surface of a rectangular slab of a plastic material whose refractive index is 1.6. If the incident ray makes an angle of 53° with the normal, find the angle made by the refracted ray with the normal (sin 53° = 4/5).

Answer 2

We know that refractive index of air is 1.

Here the incidence angle is (I)=53°

Using Snell's law

refractive index in air sin I =refractive index in glass sin r

sin 53°=1.6sin r

4/5=1.6sin r

=4/5×1.6

=1/2sin=30°

THAT ANSWER GIVEN BY GAURAV YADAV