Question

a spherical mirror produces an image of magnification - 1. , when an object is placed on the principle axis of the mirror at a distance of 40 cm from its pole ?

Answer 1

Magnification is calculated using the formula: M = y / x = v / u, where M is the magnification, y is the image size, x is the object size, v is the distance of the image from the mirror, and u is the distance of the object from the mirror.

According to given, M = +2, v = 50 cm, u = ?

Substituting the above values in the formula, we get:-

+2 = 50 / u.

Thus, u = 25 cm.

Note: The question mentions that the mirror produces an image on a screen placed 50 cm away. That means the image distance is given. The object distance however, has not been mentioned. So in the question you are required to find out the latter