#1

A ray of light impinges from air onto a block of ice (n
= 1.309) at a 67.0° angle of incidence. Assuming that this angle
remains the same, find the difference θ_{2, ice} −
θ_{2, water} in the angles of refraction when the
ice turns to water (n = 1.333).
θ_{2, ice} − θ_{2, water} =
______°

#2

The refractive indices of materials A and B
have a ratio of n_A/n_B =
1.46. The speed of light in material A is 1.30 10⁸ m/s. What is the speed of light in
material B?
______m/s