CUET Preparation Today
Two thin lenses of focal lengths $f_1$ and $f_2$ are in contact and coaxial. The power of the combination is: |
$\sqrt{\frac{f_1}{f_2}}$ $\sqrt{\frac{f_2}{f_1}}$ $\frac{f_1-f_2}{f_1 f_2}$ $\frac{f_1+f_2}{f_1 f_2}$ |
$\frac{f_1+f_2}{f_1 f_2}$ |
The correct answer is Option (4) → $\frac{f_1+f_2}{f_1 f_2}$ |
