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An electron in an excited hydrogen atom ...

An electron in an excited hydrogen atom acquired an energy of 12.1 eV. To what energy level did it jump? How many spectral lines may be emitted in the course of the transition to lower energy level? Calculate the corresponding wavelengths.

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The correct Answer is:
`n=3;` 1025 Å, 6563 Å; 1215 Å
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