It the focal length of objective lens is increased then magnifying power of:

It the focal length of objective lens is increased then magnifying power of:
  1. microscope will increase but that of telescope decrease
  2. microscope and telescope both will increase
  3. microscope and telescope both will decrease
  4. microscope will decrease but that of telescope will increase

Solution

M.P. of a microscope =Lf0Dfe
If f0↑⇒ M.P. of the microscope will decrease
M.P. of telescope =f0fe
If f0↑⇒M/O. of telescope will increase.

Asked in: NEET 2014

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