Questions
If the focal length of objective lens is increased then magnifying power of
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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 will increase.
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Correct option is D
Magnifying power of a microscope, m=LfoDfewhere f0 and fe are the focal lengths of the objective and eyepiece respectively and L is the distance between their focal points and D is the least distance of distinct vision. If f0 increases, then m will decrease. Magnifying power of a telescope, m=f0fewhere f0 and fe are the focal lengths of the objective and eyepiece respectively. If f0 increases, then m will increase.Similar Questions
Telescopes have larger diameter of objective
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