If an electric light bulb glows because of the tungsten wire present in it's filament, so how does a LED bulb glows ? Explain with a suitable picture.
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No more candles, no more gas lamps—just imagine how amazing people found the very first practical electric lamps toward the end of the 19th century. Incandescent lamps (ones that make light by making heat) are getting something of a bad press these days because they waste so much energy, but they've long been considered among the greatest inventions of all time and a burning-bright light bulb is still widely used as the symbol of a great idea. Let's take a look at these marvels of technology and find out how they work!
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it glows when electric current passes through it
with the help of some light emitting diode ,
their are also filament LED bulbs which do have a filament.
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