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physics

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calculate the refractive index for a ray travelling from air to water given that the angle of incidence is 30degrees and the angle of refraction in the water is 22 degrees.Determine the speed of the ray in water.

  • physics - ,

    Nair*sin30 = Nwater*sin22
    (It's called Snell's law).
    Nair = 1.0003 (or just use 1.00)
    Solve for Nwater

    You should get about 1.33 for Nwater

    The speed of light in water is
    c/Nwater, or about 3/4 c

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