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A student focuses the image of a well illuminated distant object on a screen using a convex lens. After that the gradually moves the object towards the lens and each time focuses its image on the screen by adjucting the lens.
(a) In which direction -towards the screen or away from the screen, does he move the lens ?
(b)What happens to the size of the image-does it decrease or increase ?
(c) What happens to the image on the screen when he moves the object very close to the lens ?

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(a) He should move the lens away from the screen.
(b) Size of the image increases.
(c) No image will be formed on the screen.

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