tracing+to+causes+or+principles
51Refractive index — Refraction of light at the interface between two media. In optics the refractive index or index of refraction of a substance or medium is a measure of the speed of light in that medium. It is expressed as a ratio of the speed of light in vacuum… …
52physics — /fiz iks/, n. (used with a sing. v.) the science that deals with matter, energy, motion, and force. [1580 90; see PHYSIC, ICS] * * * I Science that deals with the structure of matter and the interactions between the fundamental constituents of… …
53Metamaterial cloaking — Electromagnetism Electricity · …
54Troubleshooting — is a form of problem solving. It is the systematic search for the source of a problem so that it can be solved. Troubleshooting is often a process of elimination eliminating potential causes of a problem. Troubleshooting is used in many fields… …
55blood — bloodlike, adj. /blud/, n. 1. the fluid that circulates in the principal vascular system of human beings and other vertebrates, in humans consisting of plasma in which the red blood cells, white blood cells, and platelets are suspended. 2. the… …
56HEBREW LITERATURE, MODERN — definition and scope beginnings periodization …
57Bacon, Francis, Viscount Saint Alban (or Albans), Baron of Verulam — ▪ British author, philosopher, and statesman Introduction also called (1603–18) Sir Francis Bacon born Jan. 22, 1561, York House, London, Eng. died April 9, 1626, London lord chancellor of England (1618–21). A lawyer, statesman, philosopher,… …
58David Ricardo — Classical economics Born 19 April 1772(1772 04 19) Died …
59formal logic — the branch of logic concerned exclusively with the principles of deductive reasoning and with the form rather than the content of propositions. [1855 60] * * * Introduction the abstract study of propositions, statements, or assertively used …
60Agriculture and Food Supplies — ▪ 2007 Introduction Bird flu reached Europe and Africa, and concerns over BSE continued to disrupt trade in beef. An international vault for seeds was under construction on an Arctic island. Stocks of important food fish species were reported… …
