MHT CET Physics question

Physics Ray Optics and Optical Instruments MHT CET

An equi-convex lens made of glass has refractive index 1.5. If radius of each surface is changed from 5 cm to 6 cm then power [MHT-CET 2021]

(A)Decrease approximately by 5.5D
(B)Increase approximately by 3.33D
(C)Remains unchanged
(D)Decreases approximately by 3.33DCorrect

Answer: (D)

Solution

(with in m): D for 5 cm and D for 6 cm, a decrease of

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Question ID VK-069488