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Three photons coming from excited atomic...

Three photons coming from excited atomic-hydrogen sample are picked up. Their energies are `12.1 eV, 10.2 eV. And 1.9 eV`. The photons must come from

A

a single atom

B

two atoms

C

three atom

D

either two atoms or three atoms

Text Solution

Verified by Experts

The correct Answer is:
D
`12.1=E(n=3)-E(n=1)`
`10.2=E(n=2)-E(n=1)`
`1.9=E(n=3)-E(n=2)`
At least two atoms must be enveloped as three cannot be two transition from same level from same atom.
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RESONANCE ENGLISH-ATOMIC PHYSICS-Exercise ( Part II : Only one one correct type)
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