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
X-rays are a very energetic form of electromagnetic radiation that can be used to take images of the human body. Credit: Fotokon | Dreamstime X-rays are a form of electromagnetic radiation, as are radio waves, infrared radiation, visible light, ultraviolet radiation and microwaves. One of the most common and beneficial uses of X-rays is for medical imaging. X-rays are also used in treating cancer and in exploring the cosmos. Electromagnetic radiation is transmitted in waves or particles at different wavelengths and frequencies. This broad range of wavelengths is known as the electromagnetic spectrum.