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MHT CET 2023 Physics question

PhysicsRay Optics and Optical InstrumentsMHT CET 2023

A combination of two thin lenses in contact have power +10D. The power reduces to +6 D when the lenses are 0.25 m apart. The power of individual lens is

Answer: (D)

Solution

In contact, . When separated by m, , so . The powers are the roots of

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Question ID VK-098276