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NEET Sample Paper NEET Sample Test Paper-5

  • question_answer
    A ray of light falls normally on a refracting face of a prism of refractive index \[1.5\]. If the ray just fails to emerge from the prism. Then, the angle of prism is:

    A)  \[{{\sin }^{-1}}\left( \frac{2}{3} \right)\]                    

    B)  \[{{\cos }^{-1}}\left( \frac{2}{3} \right)\]

    C)  \[si{{n}^{-1}}\left( \frac{1}{2} \right)\]                  

    D)  \[si{{n}^{-1}}\left( \frac{1}{3} \right)\]

    Correct Answer: A

    Solution :

    For it, \[\sin A=\frac{1}{\mu }=\frac{2}{3}\] \[\Rightarrow \]               \[A={{\sin }^{-1}}\left( \frac{2}{3} \right)\]


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