primary ray
51The Hitchhiker's Guide to the Galaxy Primary and Secondary Phases — The terms Primary Phase and Secondary Phase describe the first two radio series of The Hitchhiker s Guide to the Galaxy . [The spelling of Hitchhiker s Guide has varied in different editions. For consistency this article always spells it this way …
52X-ray astronomy — X rays start at 0.008 nm and extend across the electromagnetic spectrum to 8 nm, over which the Earth s atmosphere is opaque. X ray astronomy is an observational branch of astronomy which deals with the study of X ray observation and detection… …
53Compton Gamma Ray Observatory — General information NSSDC ID 1991 027B Organization NASA …
54USS David R. Ray (DD-971) — USS David R. Ray (DD 971), named for Hospital Corpsman Second Class David Robert Ray a sailor killed in 1969 and posthumously awarded the Medal of Honor, was a Spruance class destroyer built by the Ingalls Shipbuilding Division of Litton… …
55Dixy Lee Ray — 17th Governor of Washington In office January 12, 1977 – January 14, 1981 Lieutenant John Cherberg Pre …
56Heat-Ray — The Heat Ray is the primary offensive weapon used by the Martians in the H. G. Wells s classic science fiction novel The War of the Worlds and its offshoots. In the novel Within the context of the novel, the term Heat Ray is more commonly applied …
57Formation evaluation gamma ray — In the field of formation evaluation, gamma ray log records natural radioactivity emission of formation. Measurement of natural emission of gamma rays in oil and gas wells are particularly helpful because shales and sandstones typically have… …
58X-ray computed tomography — For non medical computed tomography, see Industrial CT Scanning. catSCAN redirects here. For the Transformers character, see Transformers: Universe. X ray computed tomography Intervention A patient is receiving a CT scan for cancer. Outsid …
59Jacques-Donatien Le Ray — (1726 ndash; 1803) was a French Father of the American Revolution , but later an opponent of the French Revolution. His son of the same name, known also in America as James Le Ray, eventually became a United States citizen and settled in the New… …
60Gamma ray spectrometer — A Gamma Ray Spectrometer, or (GRS), is an instrument for measuring the distribution (or spectrum see figure) of the intensity of gamma radiation versus the energy of each photon. Gamma rays are electromagnetic radiation at the short wavelength,… …
