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.
Rate this question :