What is an L.E.D. flashlight?
2007-02-19 12:20:56 · 12 answers · asked by Heidi C 1 in Education & Reference ➔ Trivia
I think its light emitting diodes?
2007-02-19 12:24:19 · answer #1 · answered by professorc 7 · 3⤊ 0⤋
The flashlight uses an L.E.D. light instead of a bulb. LED does mean light emitting diode.
2007-02-19 12:30:26 · answer #2 · answered by ? 3 · 0⤊ 0⤋
Light-Emitting Diode
2007-02-19 12:29:47 · answer #3 · answered by me 3 · 0⤊ 0⤋
Light Emitting Diode. A non-technical answer to your question about the flashlight is that an LED lighted device uses less energy and lasts longer than other types of bulbs.
2007-02-19 12:28:53 · answer #4 · answered by Hermione G 5 · 0⤊ 0⤋
LEDs (Light Emitting Diodes) are those little colored lights you see in electronic equipment, household appliances, toys, on signs, and many other places. Red, yellow and green ones are the most common, since they have been around the longest. Other colors, like turquoise, blue, pure-green and white are much newer, so you may not see many of them around yet. But you will.
LEDs are different from ordinary light bulbs because they do not have a filament to break or burn out. They generate very little heat, and are ideal for putting lights into battery-operated equipment like telephones, toys, and portable computers.
An LED is basically a really fancy diode. Diodes only let current (electricity) to flow in one direction and not the other. LEDs are diodes too, but they have the unique "side effect" of producing light while electricity is flowing through them.
In the simplest terms, an LED is made with two different kinds of semiconductor material: one type that has too many free electrons roaming around inside, and another that doesn't have enough. When an electron from one material (the donor) gets pushed across a thin barrier and gets into tiny spaces in the other (the holes), a photon or particle of light is produced.
The color of light depends on a number of factors, including the type of material they make the LED with and the material's quantum bandgap (how much energy each electron needs to pack in order to cross the barrier).
A smaller bandgap that fairly weak electrons can cross gives you infrared or red light, while a large bandgap that needs really strong electrons gives you light that has a blue or violet color to it.
Things that go on inside of an LED are a little more complicated than this, but you get the idea.
2007-02-19 12:38:25 · answer #5 · answered by softball Queen 4 · 0⤊ 0⤋
Light emitting diode. In the case of a flashlight it probably has this type of light which requires less voltage than an ordinary light bulb.
2007-02-19 12:31:49 · answer #6 · answered by Anonymous · 0⤊ 0⤋
L.E.D -- Light Emitting Diode
People also sometimes call it as Light Electronic Display but only for fun.....
2007-02-19 18:06:04 · answer #7 · answered by me 3 · 0⤊ 0⤋
light emitting diode
2007-02-19 13:46:02 · answer #8 · answered by t w 3 · 0⤊ 0⤋
light emitting diode
2007-02-19 13:17:16 · answer #9 · answered by Anonymous · 0⤊ 0⤋
light emitting diode
2007-02-19 12:34:34 · answer #10 · answered by dolphinthi48 1 · 0⤊ 0⤋