How Does a Light Bulb Work?
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YouTubeScienceABC II
How Does a Light Bulb Work?
Have you ever wondered what happens inside a light bulb when you flip the switch? The incandescent bulb, first patented by Thomas Edison in the 1800s, works by heating a tungsten filament until electrons become excited and release photons — tiny packets of visible light. Yet most of the energy it consumes is wasted as heat, making it ...
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