Q. From a spherical mirror, the graph of $1/v\ versus\ 1/u$ is
A) [image:9_image47.emf]
B) [image:9_image48.emf]
C) [image:9_image49.emf]
D) [image:9_image50.emf]
Explanation
(b) $\frac{1}{u} + \frac{1}{v} = \frac{1}{f}\ $or$\ \frac{1}{v} = - \frac{1}{u} + \frac{1}{f}$
Now, compare with $y = mx + c$
Therefore graph is a straight line having negative slope
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.