Question

an object is placed at a distance of 20 cm from a concave mirror, the magnification produced is 1/2. where should the object be placed to get the magnification of 1/3​

Answer 1

Answer:

You must calculate it yourself i can just give the hint.

Explanation:

as u see magnification is 1/2 so v/u=1/2 so 2v=u. now put values of u and v in mirror formula.