Q. An object is placed in front of a convex mirror of focal length $f.$ Find the maximum and minimum distance of two object from the mirror such that the image is real and magnified.
A) $20\ and\ \infty$
B) $f\ and\ 2f$
C) $f\ and\ 0$
D) None of these
Explanation
(b) For real image $v = 0$
$\therefore$ From $\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.