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Concepts Of Physics MCQ Edition [Volume 1]PhysicsOptical Instruments

In order to increase the angular magnification of a simple microscope, one must increase

Options

  1. Athe focal length of the lens
  2. Bthe aperture of the lens
  3. Cthe object size
  4. Dthe power of the lens

Correct answer

D. the power of the lens

Step-by-step solution

The angular magnification of a simple microscope is given by M = 1 + D f or M = D f , where D is the least distance of distinct vision and f is the focal length of the lens. To increase the angular magnification, the focal length f must be decreased. Since the power of a lens is given by P = 1 f , decreasing the focal length is equivalent to increasing the power of the lens. Therefore, to increase the angular magnification, one must increase the power of the lens.

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