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MHT CET Physics question

PhysicsDual Nature of Matter and RadiationMHT CET

Photon and electron are given equal energy ( J). Wavelengths associated with photon and electron are and , then correct statement will be

Answer: (A)

Solution

J is far greater than the electron rest energy ( J), so the electron is ultra-relativistic; with kinetic energy , , hence \dfrac$

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Question ID VK-083690