>>The technology will detect an obscure yet ubiquitous
>>form of radiation known as terahertz waves, also called T-rays.
I wrote:
>
>Yawn. The fancy names those marketing guys invent to sell
>old stuff... AFAIK, these are either microwaves or infrared.
>
Hmmm... On a second thought, 1 terahertz is 10^12 cicles/second,
so the wavelength is c * second / 10^12 = 0.3 mm
There seems to be some definitions of the spectrum that
avoid classifying those waves as microwaves or IR.
From...
http://csep10.phys.utk.edu/astr162/lect/light/spectrum.html
Microwaves are from 0.1 mm to 100 mm. Infrared are from 0.0007 mm
[red] to 0.1 mm.
Alberto Monteiro
