Question

An object of size \(4.0\text{ cm}\) is placed \(25.0\text{ cm}\) in front of a concave mirror of focal length \(15.0\text{ cm}\). At what distance from the mirror should a screen be placed to obtain a sharp image? Determine the nature and size of the image.

Hint:

Always double-check your sign conventions: \(u\) is almost always negative, \(f\) is negative for concave and positive for convex mirrors.

Answer 1