A person is observing a bacteria through a compound microscope. For better analysis and to improve the…

A person is observing a bacteria through a compound microscope. For better analysis and to improve the resolving power he should
  1. increase the wavelength of light.
  2. increase the refractive index of the medium between the object and objective lens.
  3. decrease the focal length of the eye-piece.
  4. decrease the diameter of the objective lens.

Solution

For a compound microscope, resolving power is, $\mathrm{P}=\frac{2 \mu \sin \theta}{1.22 \lambda}$ $\therefore \quad$ Power will increase when refractive index $(\mu)$ is increased:

Asked in: MHT CET 2024 (04 May Shift 1)

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