Optics Question 735

Question: Monochromatic light of frequency $ 5\times 10^{14} $ Hz travelling in vacuum enters a medium of refractive index 1.5. Its wavelength in the medium is

[MP PET/ PMT 1995; Pb. PET 2003]

Options:

A) $ 4000{AA} $

B) $ 5000{AA} $

C) $ 6000{AA} $

D) $ 5500{AA} $

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Answer:

Correct Answer: A

Solution:

$ {\lambda _{m}}=\frac{{\lambda _{a}}}{\mu }=\frac{c}{\nu \mu }=\frac{3\times 10^{8}}{5\times 10^{14}\times 1.5}=4000{AA} $



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