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Photograph of (optical) caustics

  1. Mar 12, 2015 #1

    Andy Resnick

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    Caustics are singularities in the optical field:

    http://en.wikipedia.org/wiki/Caustic_(optics)

    I took this photograph of caustics created by the sun reflecting off of moving water today-

    DSC03499-1_zpsxcep9daa.jpg

    The spatial pattern of spots is related to the (local) slope of the water: Each dimension in this image corresponds approximately to 1m at the water, to give you a sense of scale. Each individual spot is not an image of the sun, but a focused spot due to (I think) a cusp catastrophe:

    http://en.wikipedia.org/wiki/Catastrophe_theory#Cusp_catastrophe
     
  2. jcsd
  3. Mar 12, 2015 #2
    Very cool! How did you capture these?
     
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