Can humans create lighting and if so what would they have to do ?

2017-03-26 11:20 pm

回答 (1)

2017-03-27 12:10 am
Sure. Our ancestors have been building fires for, perhaps, a couple of million years. Fires produce light.

"Making things hot" tends to produce light. The electric incandescent lamp uses a filament that's made of a substance that glows at a temperature lower than it melts. Thus, lighting.

"Electrical excitation" can cause some things to fluoresce. A phosphor coating in a tube can change the invisible wavelengths to visible wavelengths.


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