![]() It uses ideas of quantum mechanics instead of thermal physics.įluorescence is a process by which a substance absorbs light and then emits light of a different wavelength. There is more than one way to generate light, though. Incandescent light bulbs are not optimal sources of light. That may be useful if you live at the North Pole, but in most temperate climes it simply adds to the temperature increases that must be combated with air conditioning. As much as 90% of the energy given off by an incandescent light bulb is heat. As culture-changing an impact as incandescent light bulbs were, they have one major problem: inefficiency. However, Edison was the first to make a practical, commercially viable light bulb. ![]() Thomas Edison wasn't the first person to work on incandescent light bulbs - indeed, as early scientists as Humphrey Davy and Alessandro Volta tried to use electricity to heat a substance to glowing hot. ![]() Here, we'll look at how these lights are different, spectroscopically, than the old-fashioned incandescent light bulb. In the past, I've done columns on source lamps and light-emitting diodes (LEDs), but there's one kind of light that is becoming more popular in our everyday lives - the fluorescent light.
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