Q. For a concave mirror, if virtual image is formed, the graph between $m$ and $u$ is of the form
A)
B)
C)
D)
Explanation
(b) In concave mirror, if virtual images are formed, $u$ can have values zero and $f$
At $u = 0,\ m = \frac{f}{f - u} = \frac{f}{f} = 1$
At $u = f,\ m = \frac{f}{f - u} = - \frac{f}{- f - ( - f)} = \infty$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.