When light is refracted into a denser medium, - Vidyadip

MCQ

When light is refracted into a denser medium,

A
its wavelength and frequeny both increases
B
its wavelength increase but freqnency remains unchanged
✓
its wavelength decrease but freqnency remains unchanged
D
its wavelength and freqnency both decrease.

✓

Answer

Correct option: C.

its wavelength decrease but freqnency remains unchanged

c
$_1\mu_2 = \dfrac{v_1}{v_2} = \dfrac{v_{rarer}}{v_{denser}} \Rightarrow v_1 > v_2$3

$\Rightarrow v_1 > v_2$

$\Rightarrow \lambda_1 f_1 > \lambda_2 f_2$

Where $f$ is the frequency

when light goes from any rarer to any denser medium frequency remain unchanged.

$\therefore f_{1}=f_{2}=f$

$\Rightarrow \lambda_1 > \lambda_2$

hence wavelength decreases but frequency remains unchanged.

Option $C$ is correct.

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