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Q.

Assume, a person is standing in front of a plane mirror. The distance between the mirror and his image is 6 m. If the person moves 2 m towards the plane mirror, what would be the distance between the person and his image?


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a

4 m

b

6 m

c

5 m

d

8 m 

answer is D.

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Detailed Solution

The distance between the person and his image is equal to 8 m.
The image is 6 m away from the plane mirror. So, that means the object is also 6 m away from the mirror. When a person moves 2 m towards the plane mirror,  the distance between the plane mirror and the person is (6 m - 2 m) = 4 m. This represents the distance between the mirror, and the image will be 4 m.
The distance between the person and his image = 4+4
                                                                                   = 8 m
Thus, the distance between the person and his image is 8 m.
 
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Assume, a person is standing in front of a plane mirror. The distance between the mirror and his image is 6 m. If the person moves 2 m towards the plane mirror, what would be the distance between the person and his image?