Question

A ray of light from air enters a glass medium whose index of retraction is 1.5. if the angle of
incidence is 30 0 ,what is the sine of the angle of refraction ?

Answer 1

Answer:

sin r = 1/3

sin i ÷ sin r = n (relative refractive index)

as ray enters form air to glass,

therefore n = 1.5 = 3/2

sin 30 / sin r = 3/2

1/2 ×2/3 = sin r

sin r = 1/3 = 0.33

r = 19.47°