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If the focal length of objective lens is increased then magnifying power of:
A
microscope will increase but that of telescope decrease
B
microscope and telescope both will increase
C
microscope and telescope both will decrease
D
microscope will decrease but that of telescope increase
Detailed Solution
Microscope: $M = \frac{LD}{f_0f_e} \propto \frac{1}{f_0}$, so it decreases.
Telescope: $M = \frac{f_0}{f_e} \propto f_0$, so it increases.
Telescope: $M = \frac{f_0}{f_e} \propto f_0$, so it increases.