Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2007

  • question_answer The critical angle of light passing from glass to air is minimum for

    A)  red light                             

    B)  yellow light

    C)  green light       

    D)  violet light

    Correct Answer: D

    Solution :

    \[_{a}{{\mu }_{g}}=\frac{1}{\sin \,C}\] \[\sin \,C=\frac{1}{_{a}{{\mu }_{g}}}\] But \[{{\mu }_{v}}>{{\mu }_{R}}\] Therefore, \[{{(\sin \,C)}_{R}}>{{(\sin \,C)}_{V}}\] or            \[{{C}_{R}}>{{C}_{V}}\]

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