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NEET2009PhysicsSemiconductorsActual

A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV . It can detect a signal of wavelength :

Options

  1. A496 Å
  2. B6000 Å
  3. C4000 ~nm
  4. D6000 ~nm

Correct answer

A. 496 Å

Step-by-step solution

aligned _ & = hc eV & = 1242 eV Å 2.5 eV =4960 Å aligned

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