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Homework Help: Incandescent light

  1. Dec 19, 2004 #1
    hi ppl,
    I was wondering. In a double slit experiment, we fire light rays through two slits using two incandescent lamps. Would the interference phenomenon be observed? I thought no, is it to do with the wavelength of incandescent light being outside the spectrum? Could someone help with this problem, thanks
  2. jcsd
  3. Dec 19, 2004 #2


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    It would hard to get an interference pattern because the direction of the field would be changing constantly. The relative phase must be same hence it only works with 1 lamp.

    As far as I know its nothing to do with the wavelength, just the fact that the field is not polarised.
  4. Dec 19, 2004 #3


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    Homework Helper

    Well, there's also the fact that light from an incandescent lamp is not monochromatic. You might get interference patterns from various different frequencies, but I expect they'd overlap to such an extent that they'd be invisible.
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