Question

Monochromatic light of wavelength 590 nm is incident from air on water.
If the refractive index of water is 3/2 then its wavelength is?

Answer 1

Explanation:

Wavelength of incident light λ=589nm=589×10

−9

m

Speed of light in air c=3×10

8

m/s

μ=1.33

Frequency

ν=

λ

c

=

589×10

−9

3×10

8

=5.09×10

14

Hz

Velocity

v=

μ

c

v=

1.33

3×10

8

v=2.25×10

8

m/s

Wavelength

λ=

ν

v

=

5.09×10

14

2.25×10

8

=444nm

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