Optics Question 761
Question: The optical path of a monochromatic light is same if it goes through 4.0 cm of glass or 4.5 cm of water. If the refractive index of glass is 1.53, the refractive index of the water is
[UPSEAT 2002]
Options:
A) 1.30
B) 1.36
C) 1.42
D) 1.46
Show Answer
Answer:
Correct Answer: B
Solution:
Optical path $ \mu x= $ constant i.e. $ {\mu _{1}}x _{1}={\mu _{2}}x _{2} $
$ \Rightarrow $ $ 1.53\times 4={\mu _{2}}\times 4.5\Rightarrow {\mu _{2}}=1.36 $
