doppler-shifted frequency
71chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… …
72Phillips , William — (1948–) American physicist Phillips, who was born in Wilkes Barre, Pennsylvania, was educated at the Massachusetts Institute of Technology, where he gained his PhD in 1976. He then joined the staff of the National Bureau of Standards and… …
73shift — I. verb Etymology: Middle English, from Old English sciftan to divide, arrange; akin to Old Norse skipa to arrange, assign Date: 13th century transitive verb 1. to exchange for or replace by another ; change 2. a. to change the place, position,… …
74Fabry–Pérot interferometer — Étalon redirects here. For the commune in Somme, France, see Étalon, Somme. Interference fringes, showing fine structure, from a Fabry–Pérot etalon. The source is a cooled deuterium lamp. In optics, a Fabry–Pérot interferometer or etalon is typic …
75eclipse — eclipser, n. /i klips /, n., v., eclipsed, eclipsing. n. 1. Astron. a. the obscuration of the light of the moon by the intervention of the earth between it and the sun (lunar eclipse) or the obscuration of the light of the sun by the intervention …
76Huggins , Sir William — (1824–1910) British astronomer and astrophysicist Huggins, the son of a London silkmercer, attended school for a short period before being educated privately. After a few years in business he retired to devote himself exclusively to the study of… …
77Tachometer — A tachometer is an instrument that measures the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute (RPM) on a calibrated analog dial, but digital displays are increasingly… …
78Ruhrstahl X-4 — The Ruhrstahl X 4 was a wire guided air to air missile designed by Germany during World War II. The X 4 did not see operational service and thus was not proven in combat. The X 4 was the basis for the development of experimental, ground launched… …
79WCNC-TV — Charlotte, North Carolina Branding Carolinas NewsChannel 36 Slogan Carolinas News Channel (primary) Looking Out For You (secondary) Channels …
80Kodaikanal Solar Observatory — Kodaikanal Solar ObservatoryOrganizationIndian Institute of AstrophysicsLocationKodaikanal, IndiaCoordinatescoord|10|13|50|N|77|28|7|E|Altitude 2,343 meters (7,687 ft) Webpage [http://www.iiap.res.in/centres kodai.htm Kodaikanal Observatory]… …
