[Swordmaker]

Dr Chris Mann, one of the project leaders at the Rutherford Appleton Laboratory near Didcot, said: "These [terahertz] waves are just below infrared energy and are given off by virtually everything around us. They are also able to pass through windows, paper, clothing and, in certain instances, walls."

Something doesn't jibe here... the graphic and chart shows the "terahertz" waves as being in GAMMA RAY range, which is FAR ABOVE "Infrared" which is below visible light.

Either the chart is wrong or the scientist is misquoted or someone is scamming someone.

[bvw]

Thermal-like. Between microwave and infrared. Not up in Gamma, for G-d's sake ... we'd be very "eneregetic" if we were to be throwing off gamma rays!

[bvw]

FTW, Measurement Units Prefixes by Powers of Ten

kilo- k or K 10 ** 3
mega- M 10 ** 6
giga- G 10 ** 9
tera- T 10 ** 12
peta- P 10 ** 15

AM radio is in the 500-2,000 kilohertz range.
FM radio is in the 100 megahertz range.
Police radar is in the 10-30 giga-hertz range.
Infrared and visble light are in the peta-hertz range.

However in that (infrared, visible) range and above everyone talks of wavelengths, rather than frequencies.

This "TeraHertz" radiation is like infrared thermal imaging except the sensors in that particular frequency range had not been readily available until recently.