Question

why does the height of the object is taken to be positive in a mirror?

Answer 1

Answer:

In a convex mirror, an image formed is always erect, thus the image height is taken as positive. In a convex mirror, the image formed is always behind the mirror, therefore the image distance is taken as positive.

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Answer 2

The height of the object is taken to be positive due to the below reaosn.

Explanation:

The height of the object is taken to be positive in a mirror. This is because of the cartesian coordinates. The object is placed in negative axes of the mirror while the image will be formed at the positive axes. The object is placed parallel to y axis, that why the height of the object is taken to be positive.

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Mirror formula

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