define power .find tne power of the combination and express wheater it is converging or diverging combination .
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power is the reciprocal of the focal length of the lens
F1+f2 /f1f2 is the power of combination of two lens.
F1+f2 /f1f2 is the power of combination of two lens.
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the capacity or ability to direct or influence the behaviour of others or the course of events.
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