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  3. A student has obtained a point image of a distant object using the given convex lens

. A student has obtained a point image of a distant object using the given convex lens

To find the focal length of the lens he should measure the distance between the:

(A) lens and the object only

(B) lens and the screen. only

(C) object and the image only

(D) lens and the object and also between the object and the image

Best Answer

Ans.(B) lens and the screen. only

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