Question

magnification of concave mirror
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Answer 1

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Answer 2

Answer:

• In a concave mirror, the magnification is the ratio of the height of the image to the height of the object.The magnification is also equal to the negative of the ratio of the distance of the image from the mirror to the distance of the object from the mirror .

• magnification=(-distance of image from mirror)÷(distance of object from mirror)

• According to the Cartesian sign convention, distances from the mirror towards the object are considered as negative and the distances from the mirror to the opposite side are considered as positive.
• Distances above the principal axis are considered as positive and distances below the principal axis are considered as negative.Hence, if the image is real, the magnification is negative and if the image is virtual, the magnification is positive.