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What is a light emitting diode? Write an...

What is a light emitting diode? Write an advantage of using it over conventional low power lamps.

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Light emitting diode is a p-n junction which coverts electric energy into optical energy. .
Advantages of LED.s over conventional low power lamps are
1. Low operational voltage and less power consumption
2. Fast action and no wrap up time required.
3. The light is nearly monochromatic a
4. Long life and ruggedness
5. Fast ON/OFF switching capability
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