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    Question

    The ratio of sine of the angle of incidence to the sine

    of the angle of refraction is a constant for a given colour and for the given pair of media. Which law is this?
    A Ohm's law Correct Answer Incorrect Answer
    B Newton's law Correct Answer Incorrect Answer
    C Gauss law Correct Answer Incorrect Answer
    D Snell's Law Correct Answer Incorrect Answer

    Solution

    This is Snell's Law . Snell's Law states that the ratio of the sine of the angle of incidence (θ1)) to the sine of the angle of refraction (θ₂)) is constant and is equal to the refractive index (n) of the second medium relative to the first medium. Mathematically, it is expressed as: sin θ1 / sin θ₂ = constant This constant is the ratio of the refractive indices of the two media involved. Snell's Law can also be written as: n₁ sin θ₂ = n2 sin θ₂ where n₁ and n₂ are the refractive indices of the first and second media, respectively.

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