<https://electronicsdesk.com/light-emitting-diode.html#webpage>
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"LED is a PN junction diode, that emits light when a certain potential is provided to the diode. LED is the short form for Light Emitting Diode and is a forward biased device. This means it operates only when a forward voltage is applied to it."
<https://electronicsdesk.com/light-emitting-diode.html>