A narrow beam of light with wavelengths from 480 nm to 780 nm is incident perpendicular to one face of a prism made of crown glass, for which the index of refraction ranges from n = 1.541 to n = 1.530 for those wavelengths. The light strikes the opposite side of the prism at an angle of 36.0  .What is the angular spread of the beam as it leaves the prism? Express your answer in degrees.