1.

In a sample of H-atom if only 3 atoms are present and all are in 6th excited state then maximum possible photons of different wavelengths are

Answer»

9
10
11
12

Solution :De-exciatation of `e^(-)` from `n=7^(TH)` to ground state DIRECTLY and INDIRECT when only 3 atoms are present.

Maximum POSSIBLE photons of DIFFERENT wavelength are `=6+3+2=11`


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