JAMB - Physics (2003 - No. 19)

At what position will an object be placed in front of a concave mirror in order to obtain an image at infinity?

At the pole of the mirror

At the principal focus

at the center of the curvature

Between the principal focus and the center of curvature

For a concave mirror to produce an image at infinity, the image has to be place at the principal focus of the mirror