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2007-01-26 06:12:12 · 8 answers · asked by tatyanababygirl 1 in Science & Mathematics Earth Sciences & Geology

8 answers

In a standard lightbulb, electricity passes through a filament, which is a very thin conductor that heats up and gives off incandescent light. The filament is enclosed in a semi-vaccum and inert gas inside the bulb to keep it from burning which would break the thin filament and cause the electrical current to be interrupted.

In a flourescent bulb and neon lights, a glass tube is filled with gas and electricity is presented at one end. Once the charge is large enough, the current actually passes through the gas to reach the other contact at the end of the bulb/tube. As the electricity passes through the gas, it gives off light.

Comparatively speaking, incandescent light is much less efficient because it produces much more heat.

Hope this helps! :)

2007-01-26 06:18:04 · answer #1 · answered by disposable_hero_too 6 · 0 1

The filament. Electricity flows through this tiny wire. It gets hot and glows. It would burn up in an instant if it weren't in a vacuum.

2007-01-26 14:22:57 · answer #2 · answered by Anonymous · 0 0

Incandescent light bulbs - tungsten filament

Fluorescent bulbs - argon or mercury vapor excited by electrodes at each end of the tube

Neon lights - neon gas excited by electrodes at each end of the tube

2007-01-26 14:21:59 · answer #3 · answered by Anonymous · 1 0

For an incandescent bulb, it's the filament.

For a fluorescent bulb it's the gas inside.

2007-01-26 14:24:33 · answer #4 · answered by SHAWN G 3 · 0 0

The filament.

2007-01-26 14:18:43 · answer #5 · answered by Steven D 5 · 0 0

the filament

2007-01-26 14:42:53 · answer #6 · answered by lola 2 · 0 0

light.... bulb?
the filament

2007-01-26 14:19:27 · answer #7 · answered by buzzylinguardo 1 · 0 0

the part that is in darkness...

2007-01-26 14:19:06 · answer #8 · answered by Tha Elite One of tha Gud Muzik 2 · 0 3

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