Q. An object 5 cm tall is placed 1 m from a concave spherical mirror which has a radius of curvature of 20 cm. The size of the image is
A) 0.11 cm
B) 0.50 cm
C) 0.55 cm
D) 0.60 cm
Explanation
(c) $f = - 10\ $cm, $O = 5\ cm$,
$u = - 100\ cm,\ I = ?$
$\frac{I}{O} = \frac{f}{f - u}$
$I = \frac{- 10}{- 10 - ( - 100)} \times 5 = \frac{- 10}{90} \times 5\ cm$
$= - 0.55\ cm$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.