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NEET 2008
Exam
NEET
Year
2008
Subject
Physics
Chapter
Semiconductors

NEET 2008 · Physics · Semiconductors

A p-n photodiode is made of a material with a band gap of 2.0 eV ....

A p-n photodiode is made of a material with a band gap of 2.0eV2.0 \mathrm{eV}. The minimum frequency of the radiation that can be absorbed by the material is nearly

Options

  1. A20×1014 Hz20 \times 10^{14} \mathrm{~Hz}
  2. B10×1014 Hz10 \times 10^{14} \mathrm{~Hz}
  3. C5×1014 Hz5 \times 10^{14} \mathrm{~Hz}
  4. D1×1014 Hz1 \times 10^{14} \mathrm{~Hz}

Correct answer

C. 5×1014 Hz5 \times 10^{14} \mathrm{~Hz}

Step-by-step solution

v=Eh=\frac{E}{h}=5 ×\times10^{14}  Hz\mathrm{~Hz}
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