Optics Question 749
Question: The time required to pass the light through a glass slab of 2 mm thick is ( $ {\mu _{glass}}=1.5 $ )
[AFMC 1997; MH CET 2002, 04]
Options:
A) $ {{10}^{-5}}s $
B) $ {{10}^{-11}} $ $ s $
C) $ {{10}^{-9}} s $
D) $ {{10}^{-13}} $ $ s $
Show Answer
Answer:
Correct Answer: B
Solution:
$ t=\frac{\mu x}{c}=\frac{1.5\times 2\times {{10}^{-3}}}{3\times 10^{8}}={{10}^{-11}} $ sec
