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

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

Chhattisgarh PMTChhattisgarh PMT 2007

Solution:

Image of the object is formed at a distance $3\, m$ from the inside of the mirror.
$\therefore $ Camera should be focused at distance
$=4.5+3$
$=7.5\, m$

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