JEE Main 2019 — Physics solution | Fundamenthol

JEE Main2019Physics

Q.

The graph shows how the magnification m produced by a thin lens varies with image distance v. What is the focal length of the lens used?

A
$\frac{b ^{2}}{a c}$
B
$\frac{b ^{2} c}{a}$
C
$\frac{a}{c}$
D
$\frac{b}{c}$

Solution

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