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QM uncertainties / probabilities and light

  1. Mar 24, 2010 #1

    In trying to even ask this question it’s obvious I don’t understand enough about the topic of QM and light.

    Here is my attempt at my question:

    If I shine a laser beam at a target or sensor – the electronics every time detects the beam. How do the Schrodinger wave equation and the probability calculations and Heisenberg’s uncertainty principle apply to this situation? I assume engineers do not do probability calculations in their circuits.

    Does the Schrodinger wave equation and Heisenberg uncertainty principle not apply to a beam of light? (Is it because we are no longer talking about individual photons?)

    Bottom line: how do the “main” quantum mechanics equations and principles apply to a beam of laser light?


  2. jcsd
  3. Mar 25, 2010 #2
    the energy in a laser beam is spread around a centre value in energy, but that spread is for all practical consequences too small to be accounted for.
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