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When 1011 photons per second each with an energy of 1.28 × 10−19 J are incident...

When 1011 photons per second each with an energy of 1.28 × 10−19 J are incident on
an ideal photodiode, calculate:
(a) the wavelength of the incident radiation;
(b) the output photocurrent;
(c) the output photocurrent if the device is an APD with a multiplication factor of 18.

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