A student obtains a blurred image of an object on a screen by using a concave mirror. In order to obtain a sharp image on the screen, he will have to shift the mirror:

(a) to a position very far away from the screen (b) either towards or away from the screen depending upon the position of the object
(c) away from the screen (d) towards the screen

CBSE, class XIII guys.




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B ) either toweards or away  a little only - depends on inital position of object