Question

when is magnification positive or negative??

Answer 1

HELLO FRND.
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Give an expression related to object distance, image distance v and focal length of the mirror F. Give an expression to the magnification of a mirror too. When will the magnification be positive and negative?

Mirror Formula 1 / V + 1 / U = 1 / F


Where V is the image distance, you have object distance and F is the focal length of the mirror. Magnification: The ratio of the height of the image to the height of the object is called the magnification of the spherical mirror.

Magmfication, M = height of image (B ') / height of the object (B) = V / U

The magnification of the actual image will always be negative and the virtual image should always be positive.

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THANK YOU
@SRK6

Answer 2

Hey mate, here is your answer ===

When the image is real and erect then it's positive but if it's inverted then it's negative.

Hope it helps u dear :)