Question

Magnification produced by a concave lens is always:
(a) more than 1
(b) equal to 1
(c) less than 1
(d) more than 1 or less than 1

Answer 1

(c) Less than 1:

$M\mathrm{agnification}=\frac{\mathrm{size}\mathrm{of}\mathrm{the}\mathrm{image}}{\mathrm{size}\mathrm{of}\mathrm{the}\mathrm{object}}$

From the formula, it is clear that the magnification varies directly with the size of the image. The image formed by a concave mirror is always smaller than the size of the object. Therefore, the magnification of a concave mirror is always less than 1.