Question

# A point source of light *B* is placed at a distance *L* in front of the centre of a mirror of width *d* hung vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance 2*L* from it as shown. The greatest distance over which he can see the image of the light source in the mirror is

*d*/2
- d
- 2
*d*
- 3d

*d*/2*d*## The correct answer is: 3d

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