If the focal length of the objective lens is increased thenA. microscope will increase but that of telescope decreaseB. microscope and telescope, both will increase.C. microscope and telescope both will decreaseD. microscope will decrease, but that of telescope will increase.

If the focal length of the objective lens is increased thenA. microsco

1.	If the focal length of the objective lens is increased thenA. microscope will increase but that of telescope decreaseB. microscope and telescope, both will increase.C. microscope and telescope both will decreaseD. microscope will decrease, but that of telescope will increase.
Answer» Correct Answer - D For microscope, `M = (v_0)/(-u_0) (1 + (d)/(f_e))` and for telescope, `M = (f_0)/(f_e)(1 + (f_e)/(d))` When we increase `f_e : M` for microscope decreases and `M` for telescope increases.

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If the focal length of the objective lens is increased thenA. microscope will increase but that of telescope decreaseB. microscope and telescope, both will increase.C. microscope and telescope both will decreaseD. microscope will decrease, but that of telescope will increase.

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