physics

A narrow ray of yellow light from glowing sodium (λ0 = 589 nm) traveling in air strikes a smooth surface of water at an angle of θi = 34.9°. Determine the angle of refraction θr.

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  1. the refractive index (n) for water is ... 4/3
    ... it is 1 for air

    (n air) * sin(Θi) = (n water) * sin(Θr) ... this is Snell's law

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