Question

Why does blue light refract at greater angles than red light in transparent materials?

Answer 1

Blue light rays have shorter wave length.

Explanation:

Due to shorter wave length, blue light refraction is more than that

for red light.

Altogether, for different wave lengths, the deviation angles for the

refracted rays, at our eyes, ranges from `40^o` to `42^o`.

Reference:

http://physicsclassroom.com/class/refrn/Lesson-4/Rainbow-Formation