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The available color of LEDs are infrared, red, yellow, green, white, orange, blue, violet, ultraviolet and purple.
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Do light-emitting-diode threat health?
Depends. Normally, no. Some suggest that the impure white light produced by LEDs can cause headaches. Also, due to the method of most white LEDs (blue LED coated with yellow reactive phosphor) used to produce the color some have suggested that the LED's blue light might be dangerous (see: blue-light hazard).
What are polarized LEDs?
direction of oscillation of electric field relative to direction of motion:verticalhorizontalcircular clockwisecircular counterclockwiseany combination of above
Do led has radiation?
LEDs can also be designed to emit light in the infrared spectrum, but the radiation emitted is very slight and only has limited use, such as communication between electronic devices using infrared ports and signals. Since the diodes are so small, they cannot easily be used to generate large amounts of heat. Other LEDs fall in the visible light spectrum, with some nearing ultraviolet light.
If electrical energy goes into a light bulb what useful energy comes out?
The useful energy that comes out is light energy. Heat energy is also produced but is not useful
Which properties of a substance contribute to its colour?
Color derives from the spectrum of light (distribution of light power versus wavelength) interacting in the eye with the spectral sensitivities of the light receptors. Color categories and physical specifications of color are also associated with objects or materials based on their physical properties such as light absorption, reflection, or emission spectra.
What does a bi-colour light emitting diode do?
There are actually two different LEDs of different color inside one package, wired so that either one or the other can light depending on how power is applied to the leads. Some bi-color LEDs will also permit both to light at the same time.
Do light-emitting-diode threat health?
Depends. Normally, no. Some suggest that the impure white light produced by LEDs can cause headaches. Also, due to the method of most white LEDs (blue LED coated with yellow reactive phosphor) used to produce the color some have suggested that the LED's blue light might be dangerous (see: blue-light hazard).
What are polarized LEDs?
direction of oscillation of electric field relative to direction of motion:verticalhorizontalcircular clockwisecircular counterclockwiseany combination of above
What color LEDs in Gallium used to make?
The most comon form of LED made from Gallium Arsenide is gold and it can also be blue.
Do heat lamps give of infrared rays?
Normal LED lamps produce almost no infrared light. However, just like there are LEDs in various colors like red and green, there are also infrared LEDs.
What household items have leds?
LEDs make light, so some lights, usually outdoor ones, and some new TVs are LED backlit. Also most computer LCD screens are LED based. There are some more though.
What is a superflux led?
Superflux LEDs are the pinnacle of LED lighting. At a glance at the specifications it would appear that they are not as bright as the 3mm and 5mm LEDs, however with their 110 degree viewing angles they kick out an enormous amount of light. Making them perfect for vehicle stop lights, signs and many many more applications. Superflux LEDs are also known as Piranha LEDs. http://www.phenoptix.co.uk/Superflux_LEDs_s/35.htm
What can amber LEDs be used for?
Amber LEDs are good for when a person is camping because they don't attract as many insects. They can also make it easier to see in the dark as the eyes don't need as much time to adjust from light to dark with amber lights.
Where can you buy led light bulb cheap?
Most good electroics suppliers will have a range of LEDs for sale also such companies as Maplin who have stores and web outlets
What could you use a light emitting diode for?
There are many things you can use it for. If u have children can make a LED Christmas tree. Just type it into Google. Also ultraviolet LEDs are used to find scorpians as they light up under the light.
What do lighting bug eggs look like?
Lightening bugs are black in color with spots of red on their wings. They also have a clear ball at the end of their abdomen. This is where the light comes from.
What is the Principles of light?
A light-emitting diode (LED) is a two-lead semiconductor light source. It is a basic pn-junction diode, which emits light when activated. When a fitting voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electro luminescence, and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor. An LED is often small in area (less than 1 mm2) and integrated optical components may be used to shape its radiation pattern. Appearing as practical electronic components in 1962, the earliest LEDs emitted low-intensity infrared light. Infrared LEDs are still frequently used as transmitting elements in remote-control circuits, such as those in remote controls for a wide variety of consumer electronics. The first visible-light LEDs were also of low intensity, and limited to red. Modern LEDs are available across the visible, ultraviolet, and infra-red wavelengths, with very high brightness.
