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Can a sphere has a critial angle

  1. Jun 23, 2004 #1
    can a sphere has a critial angle
  2. jcsd
  3. Jun 23, 2004 #2


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    Staff Emeritus
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    I'm afraid you'll have to be a little more specific.

    - Warren
  4. Jun 24, 2004 #3
    i mean why the water drop can total internal reflect and we can see a rainbow.I THINK CIRLCE DOES NOT HAS TOTAL REFLECT
  5. Jun 24, 2004 #4


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    The light is refracted twice. Once when it enters the drop of water, and a second time when it exits. The angle of refraction depends on the wavelenght of the light. So red will be refracted at a different angle than blue. The whole thing works like a prism, and you get your rainbow. Is that what you wanted to know?
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