[填空题]
A light beam strikes a piece of glass.ie,kt+ k (uj2)zi nexbf +g7hf3x h(k at6u3c0hc9pd pt a 60.00$^{\circ}\,$ incident angle. The beam contains two wavelengths, 450.0 nm and 700.0 nm, for which the index of refraction of the glass is 1.4820 and 1.4742, respectively. What is the angle between the two refracted beams? $^{\circ}\,$
