Optics Question 720
Question: The length of the optical path of two media in contact of length $ d _{1} $ and $ d _{2} $ of refractive indices $
$ $ {\mu _{1}} $ and $ {\mu _{2}} $ respectively, is
Options:
A) $ {\mu _{1}}d _{1}+{\mu _{2}}d _{2} $
B) $ {\mu _{1}}d _{2}+{\mu _{2}}d _{1} $
C) $ \frac{d _{1}d _{2}}{{\mu _{1}}{\mu _{2}}} $
D) $ \frac{d _{1}+d _{2}}{{\mu _{1}}{\mu _{2}}} $
Show Answer
Answer:
Correct Answer: A
Solution:
Optical path = $ \mu t $ In medium (1), optical path = $ {\mu _{1}}d _{1} $ In medium (2), optical path = $ {\mu _{2}}d _{2} $
$ \therefore $ Total path = $ {\mu _{1}}d _{1}+{\mu _{2}}d _{2} $
