Q.

A light ray of frequency v and wavelength λ enters a liquid of refractive index 3/2. The ray travels in the liquid with

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a

frequency v and wavelength 23λ

b

frequency v and wavelength 32λ

c

frequency v and wavelength λ

d

frequency 32 v and wavelength λ

answer is A.

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Detailed Solution

μ=cv=vλvλ′32 = λλ′  o r λ′= 2λ3Note that the frequency remains unchanged.
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