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A monochromatic light wave with wavelength λ _1 and frequency ν _1 in air enters another medium. If the angle of incidence and angle of refraction at…

JEE Main 2023 — Physics Optics

2023mcqeasy

A monochromatic light wave with wavelength λ1{\lambda }_{1}λ1​ and frequency ν1{\nu }_{1}ν1​ in air enters another medium. If the angle of incidence and angle of refraction at the interface are 45∘45^{\circ}45∘ and 30∘30^{\circ}30∘ respectively, then the wavelength λ2{\lambda }_{2}λ2​ and frequency ν2{\nu }_{2}ν2​ of the refracted wave are:

Official previous-year question

Held on 6 Apr 2023 · Verified 6 Jul 2026.

Options

  1. A

    λ2=2λ1,ν2=ν1{\lambda }_{2}=\sqrt{2}{\lambda }_{1},{\nu }_{2}={\nu }_{1}λ2​=2​λ1​,ν2​=ν1​

  2. B

    λ2=λ1,ν2=12ν1{\lambda }_{2}={\lambda }_{1},{\nu }_{2}=\frac{1}{\sqrt{2}}{\nu }_{1}λ2​=λ1​,ν2​=2​1​ν1​

  3. C

    λ2=λ1,ν2=2ν1{\lambda }_{2}={\lambda }_{1},{\nu }_{2}=\sqrt{2}{\nu }_{1}λ2​=λ1​,ν2​=2​ν1​

  4. D

    λ2=12λ1,ν2=ν1{\lambda }_{2}=\frac{1}{\sqrt{2}}{\lambda }_{1},{\nu }_{2}={\nu }_{1}λ2​=2​1​λ1​,ν2​=ν1​

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