Question

Out of blue and red light which is deviated more by a prism? Give reason.

Answer 1

Red light has a lower index of refraction than blue light since it also has a shorter wavelength, so a lower index of refraction corresponds to a higher speed in a material. $n_2=1.51$ for red light and ${\theta }_2=13.09$ degrees, $n_2=1.53$ for blue light, and ${\theta }_2=12.91$ degrees.

So red light is deviated more by prism as compare to blue light.