When white light goes through the prism, it splits into a spectrum. Why red rays refract less and purple rays most of all?

1 Answer
Mar 11, 2018

This is because after refraction from the 2nd surface of prism,angle of refraction #theta prop nu#,where #nu# is frequency of light wave.

Now,purple light has the higher frequency of visible light so it bends the most whereas red light has the least frequency and bending is the least.