Question

20. A light of wavelength lambada gets refracted from vacuum
to a medium of refractive index n. The ratio of
wavelengths of incident and refracted wave is
(1) 1:n
(2) 1:1
(3) n: 1
(4) n^2:1​

Answer 1

Answer:

{μλ}vacuum  = {μλ}  medium

    λ    r

⇒​    λ  =  i

1

μ

∴ Ratio is μ:1

Answer 2

Answer:

Answer is n:1

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