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JEE Main & Advanced Physics Semiconducting Devices Question Bank Semiconductors

  • question_answer
    The energy gap of silicon is 1.14 eV. The maximum wavelength at which silicon will begin absorbing energy is [MP PMT 1993]

    A)            10888 Å                                  

    B)            1088.8 Å

    C)            108.88 Å                                 

    D)            10.888 Å

    Correct Answer: A

    Solution :

               \[{{\lambda }_{\max }}=\frac{hc}{E}=\frac{6.6\times {{10}^{-34}}\times 3\times {{10}^{8}}}{1.14\times 1.6\times {{10}^{-19}}}=10888{\AA}\]


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