The energy required to excite a hydrogen...

The energy required to excite a hydrogen atom from `n= 1` to `n = 2` energy state 10.2 eV. What is the wavelength of the radiation emitted by the atom when it goes back to Its ground state ?

`1024 Å`

`1122 Å`

`1218 Å`

`1324 Å`

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