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Three photons coming from excited atoms hydrogen sample are picked up .There energies are `12.1eV, 10.2eV and 1.9eV` these photons must come from

A

a single atom

B

two atom

C

three atom

D

either two atom or three atom

Text Solution

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The correct Answer is:
D
If the electron jumps from `n_(1)` level to `n_(1)` level, then photon of energy `12.1 e V` is emitted. If the electron jumps from `n_(2)` level to `n_(1)` then `10.2 e V` photon is emitted . Clearly , these transition are possible in minimum two atoms and maximum three atom.
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CENGAGE PHYSICS-ATOMIC PHYSICS-Single Correct
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