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An image formed by a plane mirror is:

1. erect and smaller than the object
2. erect and of same size as the object
3. inverted and larger than the object
4. inverted and smaller than the object

Correct answer: erect and of same size as the object

Solution

A plane mirror forms a virtual image that is upright (erect) and has the same size as the object. It does not magnify or diminish the object, so the image and object are equal in size.

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