Question

a ray of light falls on a glass slab at an angle of incidence 42 degree. what is the angle of emergence? a) less than 42 degree. b) more than 42 degree. c) equal to 42 degree d) 36 degree​

Answer 1

Answer:

The angle of incidence at this surface is ∠r2. The light ray emerges out of the slab forming ∠e as angle of emergence. Hence, angle of incidence equals angle of emergence.