Question

what is LED? explain​

Answer 1

Answer:

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LED :- it is short form of light emitting diode. It's action is based on conversion of electric energy into light energy. It is generally p-n junction diode in which gallium arsenide or indium phosphide is used as semiconductor.

Due to combination of holes and electrons at junction, energy is librated. In this process light emitted by it is of visible range (wavelength).

It is generally used in :-

burglar alarm

calculator

pilot lamps

telephone

digital watches

switch board.

Answer 2

Explanation:

In the simplest terms, a light-emitting diode (LED) is a semiconductor device that emits light when an electric current is passed through it. Light is produced when the particles that carry the current (known as electrons and holes) combine together within the semiconductor material.