Question

The ratio of resolving powers of an optical microscope for two wavelengths $\lambda_1 = 4000 \mathring A$ and $\lambda_2 = 6000 \mathring A$ is :

• A. 9 : 4
• B. 3 : 2
• C. 16 : 81
• D. 8 : 27

Answer 1

Answer: (B)

3 : 2

Answer 2

Resolving power $\propto \frac{1}{\lambda}$
$\frac{RP_1}{RP_2} = \frac{\lambda_2}{\lambda_2}$
$= \frac{6000 \mathring A}{4000 \mathring A}$
$= \frac{3}{2}$