Question

use of concave mirror.....In dishantina​

Answer 1

Answer:

The mirror is concave, i.e., it is diverging. Since the rays from infinity do not converge to form a real image, but instead appear to diverge, we use the notation that the focal length is negative, i.e., f=-40cm.

Now intuitively analyse, under what conditions can a concave mirror produce a magnified image? That would happen when the object lies close to the mirror and the image is formed farther away.

Magnification is the ratio of the height of the image to the height of the object. This is also equal to the negative of the ratio between the image distance and the object distance.

Explanation:

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