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Quick optics problem

  1. Oct 14, 2004 #1
    Can anyone explain to me why there is still a diffraction pattern observed even if the light is slightly converging when it hits the diffraction grating
     
  2. jcsd
  3. Oct 14, 2004 #2
    Anyone got any ideas, just need a sentance or 2 to explain why
     
  4. Oct 14, 2004 #3

    Claude Bile

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    Science Advisor

    There is a short answer: Maxwell's equations predict that it is so.

    Slightly longer answer: Even a convergent beam will begin to diffract in space as it propagates. Eventually, after propagating a certain distance the beam will begin to diverge.

    Claude.
     
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