Find the ratio of frequency of `e^(-)` in `1^(st)` orbit of H atom to `3^(rd)` of `He^(+)` ion.
Find the ratio of frequency of `e^(-)` in `1^(st)` orbit of H atom to `3^(rd)` of `He^(+)` ion.
A. `(27)/(4)`
B. `(4)/(27)`
C. `(54)/(4)`
D. `(27)/(8)`
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