Practicing Success
Practicing Success
CUET Preparation Today
|
a b c d |
b |
$\text{Image is virtual so v = +ve and u = -ve}$ $\text{Magnification } M = -\frac{v}{u} = 3$ $\Rightarrow v = -3u , \text{ if u = -x then v = 3x}$ $ f = -18 cm $ $ \text{Mirror Formula } \frac{1}{v} + \frac{1}{u} = \frac{1}{f}$ $\Rightarrow \frac{1}{3x} + \frac{1}{-x} = \frac{1}{-18}$ $\Rightarrow x = 12cm , u = -12cm$ |
