Optics Question 751

Question: Electromagnetic radiation of frequency n, wavelength $ \lambda $ , travelling with velocity v in air, enters a glass slab of refractive index $ \mu $ . The frequency, wavelength and velocity of light in the glass slab will be respectively

[CBSE PMT 1997]

Options:

A) $ \frac{n}{\mu },\frac{\lambda }{\mu },\frac{v}{\mu } $

B) $ n,\frac{\lambda }{\mu },\frac{v}{\mu } $

C) $ n,\lambda ,\frac{v}{\mu } $

D) $ \frac{n}{\mu }, $ $ \frac{\lambda }{\mu },v $

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Answer:

Correct Answer: B

Solution:

Frequency does not change with medium but wavelength and velocity decrease with the increase in refractive index.



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