Question

A man stands 3m in front of a plane mirror and has awall 4m behind him.What will be the distance between:- (A) The man and his image.(B) The man and the image of the wall.(C) If the man moves 2m away from the mirror,what will be the distance between the wall and the image of the man now?
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Answer 1

Answer:

A) 6m

B) 7m

C) 8m

Explanation:

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Answer 2

The properties of an image created by a plane mirror are- equal size, virtual, and erect.

The distance between:

• A) The man and the image:- Here the object is a man, who is 3 m away from the plane mirror. Therefore his image will also be formed at a 3 m distance in the mirror. The distance between man and object will be 3m + 3m = 6 m.
• B) The man and the image of the wall:- Distance between man and the plane mirror is 3 m. The distance between the wall and the mirror is 4 m behind him i.e. 7 m away from the mirror. The image of the wall will also be 7 m away. Therefore the distance between man and the image of the wall is 3 m + 7 m = 10 m.
• C) If the man moves 2m away from the mirror, the distance between the wall and the image of the man:- The distance of the wall from the mirror will stay 7 m. If the man moves 2 m away, the distance between him and the mirror will become 5 m. So, the distance between mirror and image of man will also be 5 m. So the distance between wall and image of man will become 7 m + 5 m = 12 m.