Q. 223.5( 4 Votes )

(a) Three photo d

Answer :


Formulas Used:

Energy of a photon:

The energy of a photon of wavelength is given by:

where is the Planck’s constant and is the speed of light in vacuum

The energy of a photon of light of the given wavelength is:

The diodes with band gaps larger than the energy of the photon won’t detect the photon. The answer is D1 and D3 .


It is easier to observe change in current with change in light intensity in reverse bias.

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