Two thin lenses of focal lengths $f_1$ a

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Target Exam

CUET

Subject

Physics

Chapter

Ray Optics

Question:

Two thin lenses of focal lengths $f_1$ and $f_2$ are in contact and coaxial. The power of the combination is:

Options:

$\sqrt{\frac{f_1}{f_2}}$

$\sqrt{\frac{f_2}{f_1}}$

$\frac{f_1-f_2}{f_1 f_2}$

$\frac{f_1+f_2}{f_1 f_2}$

Correct Answer:

$\frac{f_1+f_2}{f_1 f_2}$

Explanation:

The correct answer is Option (4) → $\frac{f_1+f_2}{f_1 f_2}$