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