Short-wave infrared radiation (SWIR) is roughly the part of the electromagnetic spectrum between 1.4 μm – 3 μm, or 100 THz – 214 THz. This places it between visible light and microwaves ...

Short wave listening around the world is declining. The downward trend is accelerating: the global short wave audience for BBC World Service has dropped from 122 million in 1996 to 97 million in 2003.

The systematic investigation of the properties and characteristics of these very short waves was taken up in view of the advantages which they seemed to offer in the field of practical radio ...

For shorter; distances and particularly over stretches of water,; however, these short waves are being found to have a useful application in providing a radio link in the ordinary land-line ...