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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……….m.

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answer is 7.5.

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Detailed Solution

Distance of image from the camera = 4.5 m + 3 m = 7.5 m.

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