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Discovery of infra red rays
Infrared light was discovered in 1800 by the British astronomer, Sir Frederick William Herschel.
Herschel noticed that the temperature of the region just beyond the red part of the spectrum was even higher than the red. Herschel demonstrated that these radiations can be absorbed, transmitted, reflected, and refracted.
Read more about Herschel HERE
Heat Applications of infra red
Transmitting information through infrared
Most television remote control units work by means of infrared radiation.
Infra red radiation used to transmit information over short distances between computers or mobile phones...
Infra Red - Satellite Photos
Sweetsearch a handy web search tool...
Properties of infra red rays
- The part of the spectrum beyond the visible region of red light
- Longer wavelength than visible light and is detected most often by its heating effect, it is sometimes called thermal radiation
- Infra red radiations given off by warm objects (remember the temperature testing at airports ?). Watch the video below to find out more...
Find out about other application of infra red
Infra Red in Imaging
Infrared cameras are used in security-related observations work, and in military surveillance as well as to locate people and animals caught in heavy smoke and for detecting hot spots in forest fires.
Infrared imaging is used to detect heat loss in buildings or to test for stress and faults in mechanical and electrical systems, and to monitor pollution.
- In archaeology, thermal infrared imaging has been used to discover hundreds of miles of ancient roads and footpaths, providing valuable information about vanished civilizations.
Do you know?
* Rattlesnakes and other reptiles can see infra-red light ?
* Some species of fish, like piranha and goldfish, can see in infrared light
* Some materials like glass which are transparent to normal light are opaque to infrared light?
* Boa snakes use infra red light to track their prey
** Vampire bats use infra red sensors to guide them to blood!!! read more....
Risks & Dangers
When your eyes are exposed to infrared light for lengthy periods of time, the longer wavelengths of this invisible light can damage your eyes. This can happen if you frequently use a welder with inadequate eye protection.
Read more HERE
Take a look at these webpages for some interesting information