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How do you see the sun after it has set?

  1. Nov 23, 2008 #1
    How do you see the sun after it has set??

    1. The problem statement, all variables and given/known data

    The density of the atmosphere decreases with height, as does the index of refraction. Explain how one can see the sun after it has set.

    2. Relevant equations

    Snell's Law:

    sin x1 * x1 = sin x2 * x2

    3. The attempt at a solution

    I'm not sure how to approach this at all, but i think it has something to do with Snell's law....
  2. jcsd
  3. Nov 23, 2008 #2

    Chi Meson

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    Re: How do you see the sun after it has set??

    Multiple choice time

    What is the name of the phenomenon that allows us to actually see the light of the sun after the sun has moved (geometrically speaking) below the horizon:
    a) reflection b) refraction c) diffraction d) interference e)scattering f) the flying spaghetti monster

    hint: which does Snell's law have to do with, and where does the "n" come from?
    Last edited: Nov 23, 2008
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