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JEE Main & Advanced Physics Ray Optics Sample Paper Topic Test - Refraction of Light Through Plane Surfaces

  • question_answer
    A light wave travels from glass to water. The refractive index for glass and water are \[\frac{3}{2}\] and \[\frac{4}{3}\] respectively. The value of the critical angle will be:

    A) \[{{\sin }^{-1}}\left( \frac{1}{2} \right)\]

    B) \[{{\sin }^{-1}}\left( \frac{9}{8} \right)\]

    C) \[{{\sin }^{-1}}\left( \frac{8}{9} \right)\]

    D) \[{{\sin }^{-1}}\left( \frac{5}{7} \right)\]

    Correct Answer: C

    Solution :

    [c] \[\frac{3}{2}\sin c=\frac{4}{3}\sin 90\] \[\Rightarrow \]\[c={{\sin }^{-1}}\left( \frac{8}{9} \right)\]


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