Question

if Vb VG Vr The velocity of blue, green and red light respectively in a glass prism, then which of the following statement gives the correct relation?

Answer 1

Dear Arjun,

# Above question is incomplete without respective options -

a. Vv = Vr = Vg

b. Vv < Vg < Vr

c. Vv > Vr > Vg

d. Vv < Vr < Vg

◆ Answer -

(b) Vv < Vg < Vr

● Explanation -

Velocity of the the light is given by formula -

V = λ.ν

As frequency of light is unchanged while passing through prism, velocity is solely dependent on wavelength of the light.

V ∝ λ

As you know, λv < λg < λr, thus -

Vv < Vg < Vr

Thanks for asking..

Answer 2

hope it helps........