A student obtains a blurred image of a distant object on a screen using a convex lens. To obtain a distinct image on the screen he should move the lens
(A) away from the screen
(B) towards the screen
(C) to a position very far away from the screen
(D) either towards or away from the screen depending upon the position of the object
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Solution
To obtain a distinct image on the screen the student should move the lens towards the screen because in order to obtain a sharp image the screen should be near the lens and the object is at a distance so it means that we can get a sharp image only when the screen is near the lens.
Hence, the correct answer is towards the screen.
Concept: Convex Mirror
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