Question:
A convex lens is used to form an image of an object on a
Last updated: 6/26/2023
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A convex lens is used to form an image of an object on a wall By moving the lens 40 cm nearer to the wall a sharp image is again obtained having one quarter the length of the first image Focal length of lens is 40 cm 40 cm 20 cm 80 3 cm