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NEET Physics Ray Optics NEET PYQ-Ray Optics

  • question_answer
    In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will angle of refraction?                                                                                          [NEET 2019]

    A)  Equal to angle of incidence

    B)      \[90{}^\circ \]

    C)  \[180{}^\circ \]           

    D)                   \[0{}^\circ \]

    Correct Answer: B

    Solution :

    [b] In TIR
    If \[i={{\theta }_{cr}}\]
    r = 90°


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