If a wave gets refracted into a denser medium, then which of the following is true?

Option 1 - wavelength, speed and frequency decreases.

Option 2 - wavelength increases, speed decreases and frequency remains constant.

Option 3 - wavelength and speed decreases but frequency remains constant.

Option 4 - wavelength, speed and frequency increases.

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Answered by

Payal Gupta | Contributor-Level 10

6 months ago

Correct Option - 3

Detailed Solution:

$μ_{2} > μ_{1}$

$\frac{μ_{2}}{μ_{1}} > 1$

$μ_{2} = \frac{c}{v_{2}}, μ_{1} = \frac{c}{v_{1}}$

$\frac{μ_{2}}{μ_{1}} = \frac{v_{1}}{v_{2}} > 1 \Rightarrow v_{1} > v_{2}$

Frequency remains constant while refraction since energy is constant

$υ = \frac{v}{λ}$

$λ α v$

$λ_{1} > λ_{2}$

$λ \to$ decreases

wavelength and speed decreases but frequency remains constant

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