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Invisible bottle glycerine

  1. Dec 16, 2009 #1


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  2. jcsd
  3. Dec 16, 2009 #2


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    Refractive index. Some liquids have refractive indices very close to those of some glasses, crystals, and other transparent solids, and the solids can appear to disappear when immersed in them. Refraction occurs at surfaces when the indices of refraction differ, but not when they are the same (or at least very close).
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