Question

Explain the working of LED

Answer 1

Working Principle: A light-emitting diode is a two-lead semiconductor light source. It is a p–n junction diode that emits light when activated. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons.

Answer 2

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Explain the working of LED?

➡Led(light emitting diode) :- the light emitting diode, represented by either of the two symbols shown here, is basically the same as a conventional p-n junctions diode. it's actual shape is also shown here.the shorter, of its two leads, corresponds to it's n(or cathode side) while the longer lead corresponds to it's p(or anode side)

the colour of the light emitted, by a given led, depend in its band -gap energy.the energy of the photons emitted is equal to or slightly less than it's band gap energy.

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