Convex lens of focal length 40 cm kept in contact with concave lens focal length 25 cm.what is the power of combined lens system
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A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. The power of the combination is. Solution : P=1f=1f1+1f2=10.4+1-0.25=-1.5diopter.
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