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MHT CET202013 Oct 2020Evening ShiftPhysicsRay OpticsActual

A simple microscope is used to see the object first in blue light and then in red light. Due to the change from blue to red light, what is the effect on its magnifying power?

Options

  1. AMagnifying power increases.
  2. BMagnifying power decreases.
  3. CMagnifying power is independent of colour of light.
  4. DMagnifying power remains constant.

Correct answer

B. Magnifying power decreases.

Step-by-step solution

The magnifying power of the simple microscope is given by M.P. =1+ D f The focal length of red light is greater than that of blue light. Hence the magnifying power decreases.

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