Question
If the focal length of the objective lens is increased, then the magnifying power of,
-
microscope will increase but that of telescope will decrease
-
microscope and telescope both will increase
-
microscope and telescope both will decrease
-
microscope will decrease but that of telescope will increase
Solution
D.
microscope will decrease but that of telescope will increase
For microscope, m = 
For telescope, m = 
m 
fo
Therefore, the magnifying power of microscope will decrease but the magnifying power of telescope will increase.
