1971 年 40 巻 5 号 p. 462-473
Quantum electronics has also contributed useful techniques to astrophysics, and the future development in astronomy in the microwave and infrared will probably be very much affected by developments in quantum electronics which affect the detection and processing of radiation. Astronomical observations have shown that maser-type amplification occurs naturally in clouds of water and of hydroxyl radicals. These, and possibly certain astro-nomical sources of high intensity infrared radiation, offer a new experimental realm and theoretical challenges to those interested in coherent radiation processes. Various important astronomical phenomena at microwave and infrared wavelengths are discussed, along with some of the technical developments needed for their careful study.