> Original Poster: "Jim Lux" <jimlux-at-jpl.nasa.gov> > An EM wave travels around the earth 7 times a second - or there > > abouts(dont remember the exact number). > That's right... about 40,000 km around the earth, and EM propagates at > 800,000 km/sec OOPS, typo... 3E8 meters/sec 300,000 km/sec (actually, 2.997 E8 is an accepted value, but, everyone uses 3E8) > >