âThe source of the credit card charge is not the subscription department of the magazines but rather some kind of service,â she wrote. âThe bill shows a telephone number, but you get only an automated voice routine, not a human being. The number is (877) 754-4892.â. Naturally, the Haggler Googled those digits.
An atomic laser based on neon atoms and pumped by a soft-X-ray (that is, a photon energy of less than one kiloelectronvolt) free-electron laser has been achieved at a wavelength of 14 nanometres. Here, we use a copper target and report a hard-X-ray inner-shell atomic laser operating at a wavelength of 1.5 angstroems. Ã¥ngstrÃ¶ms
In general, X-rays have a wavelength of between 10 and 0.01 nanometers. That's between 10-8 and 10-11 meters. Remember that a shorter wavelength means a higher frequency, and, therefore, higher energy. The frequency range of X-rays is 30 petahertz to 30 exahertz (30 x 1015 Hz to 30 x 1018 Hz) and they have energies in the 120 eV to 120 keV range. (An eV is an electron volt.). Note that X-rays are of shorter wavelength than visible light, but not as short as gamma rays.