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A photodetector used to detect the wavelength of \mathrm{1700\: nm,} has energy gap of about

Option: 1

\mathrm{0.073\: eV}


Option: 2

\mathrm{1.2\: eV}


Option: 3

\mathrm{7.3\: eV}


Option: 4

\mathrm{0.73\: eV}


Answers (1)

best_answer

\mathrm{\text { Energy }=\frac{h c}{\lambda}=\frac{6.6 \times 10^{-34} \times 3 \times 10^8}{1700 \times 10^{-9} \times 1.6 \times 10^{-19}} \mathrm{eV}=0.73 \mathrm{eV}}

Hence option 4 is correct.

Posted by

Ajit Kumar Dubey

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