Question

The object distance of a lens is -30 cm and image distance is -10 cm. Find the magnification of the lens. With the help of this, decide whether the size of the image is smaller or bigger than the size of the object.

Answer 1

Here, the lens is a concave lens used.
we know that,
$m = \frac{v}{u}$
so,
$m = \frac{ - 10}{ - 30}$
M =
$= \frac{1}{3}$
Therefore, the the image formed would be smaller than the Object