Question

what Does the negative sign in the value of magnification prOduced by a convex lens indicates About an image

Answer 1

Answer:

When a convex lens forms a real image, the magnification is considered negative. This is simply because the image is inverted. However, when a convex lens is used as a magnifier (when the object distance is less than the focal length such as in the picture below) then the virtual image is upright and therefore has a positive magnification.

Answer 2

Answer:

Negative sign indicates an inverted image

Explanation: Magnification of a spherical mirror is defined as the ratio of the height of the image to the height of the object. Its magnitude indicates how many times the size of the image is as compared to that of the object and its sign indicates whether it is erect or inverted. Positive sign indicates an erect image and negative sign indicates an inverted image

$m=\frac{height of the image}{height of the object}=(\frac{h1}{h})=-\frac{V}{U}$