A student obtains a blurred image of distant object on a screen using convex lens . To obtain distinct image on the screen he should move the lens in which direction with respect to screen ?
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The concave mirror is a diverging lens, the image is formed behind the screen so it will be blurred. In order to have a clear image, the screen should be moved away from the mirror. And it does not depend on the distance as the distance is infinity.
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Answer:
either towards or away from the screen depending upon the position of the object
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