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

NEET 2008 Physics question

Two thin lenses of focal lengths and are in contact and coaxial. The power of the combinations is

Answer: (1)

For two thin lenses in contact the equivalent focal length satisfies . Power \frac{1}{f}\frac{1}{f_1}\frac{1}{f_2}\fracf_1$ +

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Question ID VK-089957