For some types of glass, the index of refraction varies with wavelength. A prism made of a...

For some types of glass, the index of refraction varies with wavelength. A prism made of a material with

where λ0 is the wavelength in vacuum, was used to disperse while light as shown in Fig. P. The white light is incident at an angle of 50°, the wavelength λ0 of red light is 0.7 μm. and that of violet light is 0.4 μm. Determine the angular dispersion in degrees.