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Q.

It is desired to photograph the image of an object placed at a distance of 3m from the plane mirror. The camera which is at a distance of 4.5m from the mirror should be focussed for a distance of

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a

3 m

b

4.5 m

c

6 m

d

7.5 m

answer is D.

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Detailed Solution

Fo using distance of image = 4.5 m + 3 m = 7.5 m
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