1.

A hydrogen like atom in ground state absorbs `n` photon having the same energy and its emits exacity `n`` photon when electrons transition takes placed .Then the energy of the absorbed photon may beA. `91.8 eV`B. `40.8 eV`C. `48.4 eV`D. None of these

Answer» Correct Answer - A::B
No. of drank lines (in absorption) i.e. ecitation `=` No. of bright lines (in emission) i.e. de-excitation [is possible only when the `e^(-) s` is excited to `n = 2` from ground state]
Cleraly, `DeltaE = underset((Li^(2+)))(91.8 eV)` and `underset((He^(+)))(40.8eV)` are possible


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