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How the snell's law come?

  1. Oct 20, 2004 #1
    what is the snell's law?

    and how to show this
    n = sin(i)/sin(r)

    n = refractive index
    i = angle of incident
    r = angle of refraction )

    thank you!
  2. jcsd
  3. Oct 20, 2004 #2
    snell's law

    You can derive snell's law from Fermat's principle of least time


    Another derivation can be done using Huygen's principle.

    Last edited by a moderator: Apr 21, 2017
  4. Oct 20, 2004 #3

    Claude Bile

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    Or you can just solve Maxwell's equations with appropriate boundary conditions.

  5. Oct 21, 2004 #4

    Maxwell's equations on EM Waves will provide the most elegent proof of Snells Law, Laws of Reflection and all the rest. You can read it from David Griffits "Intro ...to Electrodynamics".
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