Optics Question 753
Question: A plane glass slab is kept over various coloured letters, the letter which appears least raised is
[J & K CET 2004; BHU 1998, 05]
Options:
A) Blue
B) Violet
C) Green
D) Red
Show Answer
Answer:
Correct Answer: D
Solution:
$ \mu =\frac{h}{{{h}’}}\Rightarrow {h}’\propto \frac{1}{\mu } $
$ \because {\mu _{R}}<{\mu _{V}} $ so $ {{{h}’} _{R}}>{{{h}’} _{V}} $ i.e. Red colour letter appears least raised.
