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J & K CET Engineering J and K - CET Engineering Solved Paper-2004

  • question_answer
    A piece of plane glass is placed on a word with letters of different colours. The letters which appear minimum raised are

    A)  red           

    B)  green

    C)  yellow        

    D)  violet

    Correct Answer: A

    Solution :

    Refractive index \[(\mu )=\frac{real\,depth}{apparent\,depth}\] \[\Rightarrow \] \[\mu \,\,\alpha \,\,\frac{1}{apparent\,\,depth}\] Since, violet light is refracted the maximum and red light are least, the refractive index is maximum for violet colour and minimum for red colour. Hence, letter which appears minimum raised are red.


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