Resolving power of a microscope can NOT be increased by - Vidyadip

MCQ

Resolving power of a microscope can $NOT$ be increased by

A
Using "oil immersion objective"
B
Decreasing the wavelength of light used
C
Decreasing the focal length of objective, keeping aperture same.
✓
Decreasing the aperture, keeping focal length same.

✓

Answer

Correct option: D.

Decreasing the aperture, keeping focal length same.

d
Resolving power $\propto \frac{a}{\lambda f}$

$a :$ aperture

$\lambda:$ wavelength

$\mathrm{f}:$ focal length

By immersing objective lens in oil, resolving power increases.

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