Question

if the angle of incidence is 30 degree, then what will be the angle of refraction

Answer 1

The angle of reflection is 60 degrees. (Note that the angle of incidence is not 30 degrees; it is 60 degrees since the angle of incidence is measured between the incident ray and the normal.)

Answer 2

Answer:

The angle of refraction is 19.27°.

Explanation:

This can be determined using Snell's law which states:

Refractive index = sin i/sin r ( where i is the angle of incidence and r is the angle of refraction).

[ Since the medium has not been mentioned here, we consider it to be glass( default medium)]

Refractive index of glass= 1.5

So, 1.5 = sin 30/sin r

So, sin r = 0.33

So r = sin-1( 0.33) = 19.27°.