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MHT CET Physics question

PhysicsAtomsMHT CET

A monochromatic beam of light is absorbed by a collector of ground state hydrogen atom in such a way that six different wavelengths are observed when hydrogen relaxes back to the ground state. The wavelength of the incident beam is

Answer: (A)

Solution

Six lines require , so ; the photon energy is eV and

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Question ID VK-084630