2007-05-01 09:13:33 · 5 answers · asked by Skepticat 6 in Science & Mathematics ➔ Physics
they emit light, and heres how and why...
Electrons in an excited state pass through a tungsten filament (that little wire or coil you see in a light bulb), transitioning to a lower energy state as they move through.
In order to make this energy transition to a lower state, the extra energy has to go somewhere, right? and so the excess energy leaves the electron in the form of a photon (light), thereby producing the light (photons) that comes from the bulb!
physics is cool huh :)
2007-05-01 09:33:33 · answer #1 · answered by Beach_Bum 4 · 0⤊ 0⤋
Darkness is the absence of light just as cold is the absence of heat. Light bulbs emit light, they cannot absorb darkness.
2007-05-01 16:25:12 · answer #2 · answered by msi_cord 7 · 0⤊ 1⤋
They emit light. This was understood hundreds of years ago but the discovery of the photon took until about Einstein's time.
2007-05-01 16:16:45 · answer #3 · answered by Anonymous · 0⤊ 1⤋
Actually, when a lightbulb is connected to it's circuit, the resistance caused by the rush of electrons in the filament makes it emit light.
It emits light.
2007-05-01 16:23:22 · answer #4 · answered by A & C! 2 · 0⤊ 2⤋
They emit light.
2007-05-01 16:18:52 · answer #5 · answered by Anonymous · 1⤊ 1⤋