[填空题]
A light beam strikes a piece sxu2b e6:cx/hzoj qdu3 9w 4,gjca nr7jn/0e:of gl b w o8zf2vh/x258jphlass at 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? $^{\circ}\,$