Question

It is desired to photograph the image of an object placed at a distance of 3 m from plane mirror. The camera, which is at a distance of 4.5 m from mirror should be focussed for a distance of(a) 3 m(b) 4.5 m(c) 6 m(d) 7.5 m

Answer 1

(c)6 m

this is because the distance between the object and the image is 6 m.

Answer 2

Answer is7.5 as 3+4.5

3 distance of object nd 4.5 of image