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Article Directory :: Reference & Education Articles
The subject matter on the origin and types of infra-red light has some significance to human applications since it brings about various health benefits that all of us would welcome in many cases.
Infrared light itself is characterized as an electronic radiation with wavelengths longer than visible light, which is measured via the nominal red light edges at 0.74 micrometers and extending all the way up to 300 micrometers. Such wavelengths complement frequency ranges from 1 to 400 Terahertz, and it includes thermal radiation for the most part emitted by various objects with room temperature. Molecules in the body absorb and emit infrared light as they change their rotational or vibratory movements.
Sunlight is everything; it gives life to all living creatures in the world. At its zenith, it provides radiance of over a kilowatt for every surface square meter at sea level. From this energy, about 527 watts becomes infrared radiation, while 445 watts becomes visible light and about 32 watts are identified as ultraviolet radiation respectively.
All of us experience infrared light whenever we feel the sun's heat struck down upon our skin. Scientists compare this to electromagnetic energy waves traveling through space light; while we dismiss it simply as radiant heat visible through our eyes. This detectable light however is just a very tiny fraction of all the light types that exists everywhere; and among them, infrared light comes unseen to us, as with other forms, such as X-rays, Gamma rays, radio waves, microwaves and ultraviolet light. All these radiate the same electromagnetic energy type, and they only differ through their wavelengths.
Whenever we see anything via visible light, we are able to identify and distinguish the light of various waves through the different existing colors. Every color also displays distinct wavelengths, with violet for example, seen at 0.4 micron light wavelengths. Yellow light is registered at 0.6 microns long. The reddish colors on the other hand begin with 0.65 micron wavelengths. Your eyes are naturally unable to see light in 0.7 micron wavelengths.
Such wavelengths are what we call infrared light, recorded at 0.7 microns to 0.1 millimeter. Infrared lights are a thousand times wider as compared to that of visible light. Think of it as that light emanating from the remote control in changing TV channel programs and you'll get the idea.
Hot objects all around us emit much longer infrared light wavelengths. That should explain why we are unable to see thermal infrared lights from say, hot pieces of metal in soldering iron even if we are able to feel the heat fully on our skin from up close. Scientists these days rely on various device types on detecting and measuring infrared light. Astronomical cameras are able to see various light types that regular telescopes are unable to pick up.
The origin and types of infrared light points out that infrared radiation is just like visible light since it displays the same exact properties as that of visible light. It can also be focused and reflected just like visible light, and can even be aligned just like regular light, which means it can be polarized. The applications can be endless.
Notice: The article you are reading is for your personal edification. The information contained therein is for educational purposes only and is not to be used in place of proper medical advice, nor is it intended to treat, diagnose or cure any ailments. One should always seek out a properly licensed medical professional to answer any questions or render treatment. As always please check with your doctor before engaging in any new regimen.
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