Question

The magnification of a concave mirror is -1.5 when the object is placed at a distance of 20cm from the mirror. Find the image distance ?

Answer 1

$\huge{\textbf{\underline{\underline{ANSWER}}}}$

Magnification = Image distance/object distance

- 1.5 = v/20

v = - 1.5 × 20

v = - 30 cm

So the image distance is - 30 cm