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BCECE Engineering BCECE Engineering Solved Paper-2009

  • question_answer
    A convex lens of glass (\[\mu =1\] of 8 cm when place in has a focal length of lens when air. What is the focal \[\left( \mu =\frac{4}{3} \right)?\]

    A)  \[4cm\]                              

    B)  \[8\,cm\]

    C) \[16\,cm\]                          

    D)        \[32\,cm\]

    Correct Answer: D

    Solution :

    \[{{f}_{water}}=4\times {{f}_{air}}\] \[=4\times 8=32\,cm\]


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