Question

Given a series of lens of known focal lengths +5cm,+10cm,-5cm,-10cm,-20cm,-25cm.Pick any four lenses and arrange them in an order for increasing bending power.Identify any two lenses of same bending power.Will convex and concave lens of same focal length have similar extent of bending power?What will be the differences in nature of bending in such case?

Answer 1

Answer:

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