A convex lens of focal length 25 cm is placed coaxially in contact with a concave lens of focal length 20 cm.
A convex lens of focal length 25 cm is placed coaxially in contact with a concave lens of focal length 20 cm. Determine the power of the combination. Will the system be converging or diverging in nature ?
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Power of convex lens P1 = 1/0.25 = 4D
Power of concave lens P2 =- 1/0.20 = - 5D
Power of the combination, P = P1 + P2 = - 1D
Nature : Diverging
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