A person uses +1.5 D glasses to have normal vision from 25 cm onwards. He uses a +20 D lens as a simple microscope to see an object. What is the maximum magnifying power if he uses the microscope without glasses?
Text Solution
Verified by ExpertsThe correct answer is:
B
Let 
be the distance of near point of the person without glasses.
Focal length of glasses, 
Now 
?
From lens formula, 
or 
Therefore, the near point of the person is 40 cm .
Focal length of microscope,
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