question_answer

The electron in a hydrogen atom makes a transition form \[({{n}_{2}})\] to \[{{n}_{1}}\] state. The time period of the electron in the initial state \[{{n}_{2}}\] is eight times that in the final state \[{{n}_{1}}=8,\,\,\,\,{{n}_{2}}=1\]. The possible values of \[{{n}_{1}}=4,\,\,\,\,{{n}_{2}}=2\] and \[{{n}_{1}}=2,\,\,\,\,{{n}_{2}}=4\] are

A)  \[{{n}_{1}}=1,\,\,\,\,{{n}_{2}}=8\]

B)  \[9land\,\,l\]

C)  \[~9land\,\,\,\,3l.\]

D)  \[5land\,\,l\]