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The frequency of radiations emitted when...

The frequency of radiations emitted when electron falls from `n = 4` to `n = 1` in `H-"atom"` would be (Given `E_1` for `H = 2.18 xx 10^-18 J "atom"^-1` and `h = 6.625 xx 10^-34 Js`.)

A

`1.54xx10^(15)s^(-1)`

B

`1.03xx10^(15)s^(-1)`

C

`3.08xx10^(15)s^(-1)`

D

`2xx10^(15)s^(-1)`.

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The correct Answer is:
C
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