A simple camera with a converging lens of 60 mm focal length is focused on very far objects. To focus the camera on a nearby object 1.5 m away, the distance between the film and lens will have to be
decreased by 2.5 mm
increased by 2.5 mm
kept fixed as before. but aperture increased by a factor of 2.5
kept fixed as before, hut aperture decreased by a factor of 2.5
A
kept fixed as before. but aperture increased by a factor of 2.5
B
increased by 2.5 mm
C
decreased by 2.5 mm
D
kept fixed as before, hut aperture decreased by a factor of 2.5
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Solution
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Answer is B.
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