The Spectra of Hydrogen and Helium

  title={The Spectra of Hydrogen and Helium},
  author={N. Bohr},
  • N. Bohr
  • Physics
  • Nature
  • IN a letter to NATURE of February 11, Prof. J. W. Nicholson discusses the recent interesting experiments of Mr. Evans on the spectrum emitted from a vacuum tube containing highly purified helium and subject to a heavy discharge. Evans found that the 4686 series and the Pickering series can be obtained in a helium spectrum showing no trace of the ordinary hydrogen lines. These series were observed a few years ago by Prof. Fowler by sending a heavy discharge through a mixture of hydrogen and… CONTINUE READING
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