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Question

An object is placed 1.5 m from a plane mirror. How far is the image from the object?


A

3m

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B

1.5m

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C

2m

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D

0m

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Solution

The correct option is A 3 m

In the plane mirror, the image distance is always equal to the object distance from the mirror. According to the question, the object distance is 1.5 m so the image distance will be 1.5 m and the distance between the object and image will be 3 m.

The characteristics of an image formed by a plane mirror are:

  • Image formed is virtual
  • The distance of the image ‘behind’ the mirror is equal to the distance of the object in front of the mirror
  • The size of the image formed is equal to the size of the object
  • The image is laterally inverted

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