The Light Bulb: More Complicated Than You Think
With incandescent bulbs on their way out, it's a good time to take a look back at the technology that has been almost ubiquitous for decades. Bill Hammack, a professor at the University of Illinois — Urbana, take a close-up view at the filament, which is much more complicated than many of us would have expected. It isn't just a wire, but rather a coil within a coil, and the surprises don't stop there.
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