Power frequencies grounding practices

A/ is the intensity decrease on traversing unit distance in a sample with ground-state population density of A typical value of 5 is 10" ° cm" s photon" molecule" and at 1 torr pressure Ng is about 10 molecules cm . In this case a relative attenuation A/// of 10" is obtained at 7=10 photons cm" s", i.e., about 10 watt cm" s" for visible radiation. Powers of these orders of magnitude, at narrow frequency bandwidths, are practical only with laser sources. For TPE applications, lasers are often (not always) operated in a pulsed mode, allowing easy... 

A simple example of why 1 make this comment comes to mind. 1 was reading the papers in the December 2002 IEEE Magazine which discuss the transmission of power to earth from space. Several problems with interference created by reradiation of energy at harmonic frequencies were discussed. I could see potential cures simply from scanning the initial chapters. I would also be interested in applying these concepts to my current research namely, time-domain ground-penetrating radar (GPR). Some neat antennas may become practical. 

---