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
The light generated by stimulated emission is very similar to the input signal in terms of wavelength, phase, and polarization. This gives laser light its characteristic coherence, and allows it to maintain the uniform polarization and often monochromaticity established by the optical cavity design.