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A page about infrared radiation, infrared astronomy , thermal imaging and other uses.
A guide to infrared astronomy including what infrared is, technology, history and recent images. This is a very comprehensive site,.
Inofrmation on infrared (IR), a broad range of frequencies, beginning at the top end of those frequencies used for communication and extending up the the low frequency (red) end of the visible ...
How to detect IR waves, make an IR filter and an explanation of how heat relates to sound.
Information about the University of California (at Berkeley) special interferometer used for accurate positioning and data from space
The site gives a short history of infrared thermal imaging, including some of the latest developments. Of interest to photographers as well as of direct use for physics students.
NASA page about electromagnetic waves with descriptions of such waves and their uses.Covers radio waves, microwaves, infrared, visible light, ultraviolet (UV), x-rays and gamma rays.
The site explains the basic of the electromagnetic spectrum and the various wavelengths of which it is composed (Radio Waves, Microwaves , Infrared, the Visible Spectrum, Ultraviolet, Gamma Rays, ...
The key to classifying a galaxy as a Seyfert Galaxy is the presence of broad emission lines from the bright, star-like nucleus. They are often strong radio and infrared sources. The first such active ...
A brief description of how Night Vision works using image enhancenment or thermal imaging, from Marshall Brain's HowStuffWorks.com. A good overview of the use of infrared imaging and its applications.