Question

The find speed of red light of wavelength 4 x 10-24 Hz in vacuum if its
wavelength is 7.5 x 10 m.
​

Answer 1

Answer:

Given,

frequency, f=4×10

14

Hz

Wavelength, λ=5×10

−7

m

velocity, v=fλ

=4×10

14

×5×10

−7

=20×10

7

v=2×10

8

m/s

Refractive index, μ=

v

c

=

2×10

8

3×10

8

μ=1.5