CUET Preparation Today
CUET
Physics
Ray Optics
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$ m = \frac{1}{n} = -\frac{v}{-u}$
$ v = \frac{u}{n}$
Mirror Equation
$\frac{1}{v} + \frac{1}{u} = \frac{1}{f}$
$ \frac{n}{u} + \frac{1}{-u} = \frac{1}{f}$
$\Rightarrow u = (n - 1)f$
