Question

A convex mirror has a focal length of -10 cm. What is the image distance s_i if the image is upright and 1/2 the size of the object? (Be careful about the sign of the image distance.)

Answer 1

Solution: Given:- Focal length, ,

Magnification in a convex mirror is given by:

Here, is object size, and is image size.

.................(i)

By lens makers formula, we have:

Here, u = object distance, v=image distance, and f = focal length.

Substituting the value of and from equation (i), we get:

. Ans