Two thin lenses of focal lengths f 1 and f 2 are in contact and coaxial. The power of the…
Physics · NEET · NTA Exams — Optics
Two thin lenses of focal lengths f1 and f2 are in contact and coaxial. The power of the combination is
- \(\sqrt{\frac{f_{1}}{f_{2}}}\)
- \(\sqrt{\frac{f_{2}}{f_{1}}}\)
- \(\frac{f_{1}-f_{2}}{f_{1} f_{2}}\)
- \(\frac{f_{1}+f_{2}}{f_{1} f_{2}}\)
Answer
(D) f_ 1 +f_ 2 f_ 1 f_ 2
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