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λ = 100nm 1μm 10μm 100μm 1mm 1cm 1dm 1m 10m
f = 3PHz 300THz 30THz 3THz 300GHz 30GHz 3GHz 300MHz 30MHz
0% Zenith 50% transmission 100%
94GHz
0.5dB/km
H2O
1.55μm
Atmospheric
molecular
absorption:
O2 H2O
CO2 O3
etc...
>1000dB/km
Scattering
O2
60GHz
14dB/km
H2O
22GHz
0.2dB/km
„THz“
Technology?
400GHz ITU RR 9kHz