Q. The separation between two microscopic particles is measured $P_{A}$ and $P_{B}$ by two different lights of wavelength $2000\ \mathring{\mathrm{A}}$ and $3000\ \mathring{\mathrm{A}}$ respectively, then
A) $P_{A} > P_{B}$
B) $P_{A} < P_{B}$
C) $P_{A} < 3/2P_{B}$
D) $P_{A} = P_{B}$
Explanation
(b) Resolving limit (minimum separation) $\propto \lambda$
$\Rightarrow \frac{P_{A}}{P_{B}} = \frac{2000}{3000} \Rightarrow P_{A} < P_{B}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.