Question

Light is travelling through air reaches quartz at an angle of incidence of 35°. The index of refraction of quartz is 1.54. At what angle of refraction does the light travel into the quartz?

Answer 1

1.54 = sin 35/sin r

sin r = 0.57/1.54 =0.37

r = sin^-1( 0.37)

=21.7°