refraction travel time
111Navigation — This article is about determination of position and direction on or above the surface of the earth. For other uses, see Navigation (disambiguation). Table of geography, hydrography, and navigation, from the 1728 Cyclopaedia. Navigation is the… …
112Ocean surface wave — Ocean surface waves are surface waves that occur on the free surface of the ocean. They usually result from wind, and are also referred to as wind waves. Some waves can travel thousands of miles before reaching land. They range in size from small …
113James Clerk Maxwell — (1831–1879) Born 13 June 1831 …
114Scientific method — …
115Cherenkov radiation — glowing in the core of the Advanced Test Reactor …
116Nanosecond — A nanosecond (ns) is one billionth of a second (10−9 s). One nanosecond is to one second as one second is to 31.7 years. The word nanosecond is formed by the prefix nano and the unit second. Its symbol is ns. A nanosecond is equal to 1000… …
117Sonar — This article is about underwater sound propagation. For atmospheric sounding, see SODAR. For other uses, see Sonar (disambiguation) …
118Optical phenomenon — An optical phenomenon is any observable event that results from the interaction of light and matter. See also list of optical topics and optics. A mirage is an example of an optical phenomenon. Common optical phenomena are often due to the… …
119Truman Capote — Infobox Writer name = Truman Capote caption = Truman Capote, as photographed by Roger Higgins in 1959 birthdate = birth date|1924|09|30 birthplace = New Orleans, Louisiana, United States deathdate = death date and age|1984|8|25|1924|11|30… …
120Seismic source — This article is about artificial seismic sources. For natural seismic sources, see Earthquake, Volcano, and related articles. A seismic source generates controlled seismic energy that is used in both reflection and refraction seismic surveys. A… …
