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A point source of light B is placed at a...

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

A

`d//2`

B

d

C

2d

D

3d

Text Solution

Verified by Experts

The correct Answer is:
a.
`Delta`s IAB and ICD are similar.
`(CD)/(AB)=(IE)/(IF)=(3L)/(L)=3`
`CD=2AB=3d`
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