Light of wavelength 700 nm is incident on the face of a fused quartz prism (n 5 1.458 at 700 nm) at an incidence angle of 75.0â°. the apex angle of the prism is 60.0â°. calculate the angle (a) of refraction at the first surface, (b) of incidence at the second surface, (c) of refraction at the second surface, and (d) between the incident and emerging rays.