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Thought Expirement: Light In a Mirrored box

  1. Jul 14, 2012 #1
    A theoretically perfect mirror with no gaps cracks, (no absorbing surfaces), so small that only a single photon could tightly fit inside

    Is it stopped? If so let's get our scales ;)
  2. jcsd
  3. Jul 14, 2012 #2


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    2017 Award

    Staff: Mentor

    Photons can "stack" without any problems. Your box would have a discrete spectrum of allowed energies (corresponding to standing waves in the box), similar to a laser. For each allowed frequency, you can have an arbitrary amount of photons inside.
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