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Ananya Shree

Class 10th
Science
2 years ago

A convex lens of focal length 25 cm and a concave lens of focal length 10 cm are placed in closed contact with each other. Calculate the lens power of the combination.

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Muskan Anand

2 years ago

Power of convex lens, P1 = 1f1=10.25 = 4D Power of concave lens, P2 = 1f2=1−0.1 = -10D power of combination, P = P1 +P2 = 4D – 10D = -6D

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