Question

From a spherical mirror, the graph of $1/v$ vs $1/u$ is

• A.
• B.
• C.
• D.

Answer 1

Answer: (B)

$\frac{1}{v}+\frac{1}{u}=\frac{1}{f}.$ If $y=\frac{1}{v}$ and $x=\frac{1}{u}\Rightarrow y+x=c$
where $c=\frac{1}{f}$ is a straight graph with a -ve slope.