1.

In a hydrogen like atom electron make transition from an energy level with quantum number `n` to another with quantum number `(n - 1)` if `n gtgt1` , the frequency of radiation emitted is proportional to :A. `(1)/(n)`B. `(1)/(n^(2))`C. `(1)/(n^(3)//2)`D. `(1)/(n^(3))`

Answer» Correct Answer - D
`DeltaE=hv`
`v=(DeltaE)/(h)=k[(1)/((n-1)^(2))-(1)/(n^(2))]=(2Kn)/(n^(2)(n-1)^(2))~~(2K)/(n^(3))prop(1)/(n^(3))`


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