Optics Question 732

Question: If the speed of light in vacuum is $ C $ $ m/\sec , $ then the velocity of light in a medium of refractive index 1.5

[NCERT 1977; MP PMT 1984; CPMT 2002]

Options:

A) Is 1.5 $ \times $ C

B) Is C

C) Is $ \frac{C}{1.5} $

D) Can have any velocity

Show Answer

Answer:

Correct Answer: C

Solution:

$ \mu =\frac{C}{C _{m}}\Rightarrow C _{m}=\frac{C}{1.5} $



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