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    Consider an equilateral glass prism on which a ray of light incident at an angle θ and passes through the prism in such a way that the refracted
    Question

    Consider an equilateral glass prism on which a ray of light incident at an angle θ and passes through the prism in such a way that the refracted ray inside the prism is parallel to its base and emerges at an angle of emergence β . Which of the following is true?

    A.

    θ = - β

    B.

    θ = 2β

    C.

    θ = β

    D.

    θ = - 2β

    Correct option is C

    The correct answer is (C)  ​θ = β

    • ​When a ray of light passes through an equilateral glass prism in such a way that the refracted ray inside the prism is parallel to its base, this situation corresponds to the condition of minimum deviation.

    Properties: 

    • Angle of Incidence (θ) and Angle of Emergence (β):
      The angles of incidence (θ) and emergence (β) are equal.

      θ=β

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