A 4 cm tall object is placed on the principal axis of a convex lens. The distance of the object from the optical centre of the lens is 12cm and its sharp image is formed at a distance of 24cm from it on a screen on the other side of the lens. If the object is now moved a little away from the lens, in which way (towards the lens or away from the lens) will he have to move the screen to get a sharp image of the object on it again? How will the magnification of the image be affected?
CBSE OUTSIDE DELHI - SET 2 2015
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- When the object is moved a little away from the lens, then the screen should be moved towards the lens. A sharp image is formed.
- When the object is moved a little away from the lens, then the magnification of the mage decreases.
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