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Q.

A boy looks in a plane mirror, the distance of his image from the mirror is 3 m. What will be the distance between the boy and the mirror?


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a

4 m

b

3 m

c

2 m

d

1 m 

answer is B.

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Detailed Solution

A boy looks in a plane mirror, the distance of his image from the mirror is 3 m .The distance between the boy and the mirror is [14][15]3 m.[16][17]
The main property of the image formed by a plane mirror is virtual and erect. The distance between the mirror and the image is always equal to the distance between the mirror and the object in front of it. So, when the boy is looking at a mirror, and the image is 3 m  away from the mirror, then the boy is also  [18][19]3 m away from the mirror.[20][21]
 
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