The Atomic Spectrum

  1. When doing an experiment in order to observe the atomic spectra of some gas. We observe while peaking through the diffraction grating, symmetrical lines starting from n=1. Where does this symmetry arise from? Why do we see the same spectrum repeated on both, left side and right side. As if there was a mirror instead of the gas tube that reflected the first spectrum to the opposite side.

    Thanks.
     
  2. jcsd
  3. mfb

    Staff: Mentor

    The setup is symmetric, there is no reason why the lines should be asymmetric.
     
  4. Thank you for your reply.
     
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