propagating
121Timeline of Christian missions — This timeline of Christian missions chronicles the global expansion of Christianity through a sampling of missionary outreach events. A more general timeline of Christianity and History of Christianity is also available. Apostolic Age Earliest… …
122Crystal optics — is the branch of optics that describes the behaviour of light in anisotropic media, that is, media (such as crystals) in which light behaves differently depending on which direction the light is propagating. The index of refraction depends on… …
123Scattering — is a general physical process where some forms of radiation, such as light, sound, or moving particles, are forced to deviate from a straight trajectory by one or more localized non uniformities in the medium through which they pass. In… …
124Richard Lindzen — Richard S. Lindzen Born 8 February 1940 (1940 02 08) (age 71) Webster, Massachusetts Fields Atmospheric physics …
125Spiral galaxy — A spiral galaxy is a galaxy belonging to one of the three main classes of galaxy originally described by Edwin Hubble in his 1936 work “The Realm of the Nebulae” [cite book |last=Hubble |first=E. P. |authorlink=Edwin Hubble |title=The Realm of… …
126Reputation — For other uses, see Reputation (disambiguation). Reputation of a social entity (a person, a group of people, an organization) is an opinion about that entity, typically a result of social evaluation on a set of criteria. It is important in… …
127Power line communication — or power line carrier (PLC), also known as power line digital subscriber line (PDSL), mains communication, power line telecom (PLT), power line networking (PLN), or broadband over power lines (BPL) are systems for carrying data on a conductor… …
128Coronal mass ejection — A coronal mass ejection in time lapse imagery obtained with the LASCO instrument. The Sun (center) is obscured by the coronagraph s mask. (September 30 – October 1, 2001) A coronal mass ejection (CME) is a massive burst of solar wind, other light …
