Question

A ray of light is incident on a glass slab
making an angle of 30° with the surface. The
angle of refraction in glass, if the refractive
index of glass is 1.6,
is here 30 degree is the glancing angle?​

Answer 1

Answer:

refractive index = sin i / sin r

1.6 = sin 30 / sin r

1.6 = 0.5 / sin r

sin r = 3.2