Two thin lenses of focal length `f_(1)` and `f_(2)` are in contact and coaxial. The power of the combination isA. `(f_(1)+f_(2))/(2)`B. `(f_(1)+f_(2))/(f_(1)f_(2))`C. `sqrt((f_(1))/(f_(2))`D. `sqrt((f_(2))/(f_(1))`

Two thin lenses of focal length `f_(1)` and `f_(2)` are in contact and

1.	Two thin lenses of focal length `f_(1)` and `f_(2)` are in contact and coaxial. The power of the combination isA. `(f_(1)+f_(2))/(2)`B. `(f_(1)+f_(2))/(f_(1)f_(2))`C. `sqrt((f_(1))/(f_(2))`D. `sqrt((f_(2))/(f_(1))`
Answer» Correct Answer - B `P=P_(1)+P_(2)=(1)/(f_(1))+(1)/(f_(2))` `F=(f_(1)+f_(2))/(f_(1).f_(2))`

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Two thin lenses of focal length `f_(1)` and `f_(2)` are in contact and coaxial. The power of the combination isA. `(f_(1)+f_(2))/(2)`B. `(f_(1)+f_(2))/(f_(1)f_(2))`C. `sqrt((f_(1))/(f_(2))`D. `sqrt((f_(2))/(f_(1))`

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