Q. Which of the following graphs is the magnification of a real image against the distance from the focus of a concave mirror
A)
B)
C)
D)
Explanation
(d) For concave mirror $m = \frac{f}{f - u}$
For real image $m = - \frac{f}{(u - f)} = - \frac{f}{x}$
$= - \frac{f}{(Distance\ of\ object\ from\ focus)} \Rightarrow m \propto \frac{1}{x}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.