NEET Sample Paper NEET Sample Test Paper-9

  • question_answer When the angle at incidence on a material is \[{{60}^{o}},\]the reflected light is complete polarized. The velocity of the refracted ray inside the material is (in m/s)

    A)  \[3\times {{10}^{8}}\]                    

    B)  \[\left( \frac{3}{\sqrt{2}} \right)\times {{10}^{8}}\]

    C)  \[\sqrt{3}\times {{10}^{8}}\]                     

    D)  \[0.5\times {{10}^{8}}\]

    Correct Answer: C

    Solution :

    From Brewster's law, \[\mu =\tan \,ip\] \[\frac{C}{V}=\tan {{60}^{o}}=\sqrt{3}\] \[V=\frac{C}{\sqrt{3}}=\frac{3\times {{10}^{8}}}{\sqrt{3}}=\sqrt{3}\times {{10}^{8}}m/s\]

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