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MHT CET 2025 Physics question

PhysicsDual Nature of Matter and RadiationMHT CET 2025

The energy that should be added to an electron to reduce its de-Broglie wavelength from to is n times the initial energy. The value of 'n' is

Answer: (B)

Solution

The de-Broglie wavelength of an electron of kinetic energy is , so . When becomes , the energy becomes

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Question ID VK-102481