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Question: Answered & Verified by Expert
A person is observing a bacteria through a compound microscope. For better observation and to improve its resolving power he should
PhysicsRay OpticsMHT CETMHT CET 2023 (10 May Shift 1)
Options:
  • A increase the wavelength of light.
  • B increase the refractive index of the medium between the object and objective léns.
  • C decrease the focal length of the eyepiece.
  • D decrease the diameter of the objective lens.
Solution:
2691 Upvotes Verified Answer
The correct answer is: increase the refractive index of the medium between the object and objective léns.
Resolving Power $\mathrm{R}=\frac{\text { N.A }}{0.61 \lambda}$
$\text { N.A }=2 \mathrm{n} \sin \alpha$
$\therefore \quad$ By increasing the refractive index of the medium between the subject and the objective lens, the resolving power can be increased.

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