Question

When light enters from air to glass, it bends toward the normal. If red, blue, and yellow colours are allowed to enter the same glass block at the same angle of incidence, then for which colour, the value of ∠i − ∠r, be greater?

Options

• green

• red

• blue

• yellow

Answer 1

Blue

Explanation:

Blue light is refracted more than red and yellow light in glass. It has the smallest angle of refraction for the same angle of incidence, so the difference between the angles is greatest for blue light.