Optics Question 372
Question: The separation between two microscopic particles is measured $ P _{A} $ and $ P _{B} $ by two different lights of wavelength 2000 Å and 3000 Å respectively, then
[AIEEE 2002]
Options:
A) $ P _{A}>P _{B} $
B) $ P _{A}<P _{B} $
C) $ P _{A}<3/2P _{B} $
D) $ P _{A}=P _{B} $
Show Answer
Answer:
Correct Answer: B
Solution:
Resolving limit (minimum separation) $ \propto \lambda $
$ \Rightarrow \frac{P _{A}}{P _{B}}=\frac{2000}{3000}\Rightarrow P _{A}<P _{B} $
