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BCECE Engineering BCECE Engineering Solved Paper-2013

  • question_answer
    A plane glass slab is kept over various coloured letters, the letter which appears least raised is

    A)  violet                   

    B)         blue                     

    C)         green             

    D)         red

    Correct Answer: D

    Solution :

    Rise = Real depth-apparent depth \[=R.D-\frac{R.D}{\mu }\] \[=R.D\left( 1-\frac{1}{\mu } \right)\] Thus, for least rise\[\mu \]should be least. Refractive index is least for red colour.


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