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Nehru, Jawaharlal

(Encyclopedia)Nehru, Jawaharlal jəwähərlälˈ nāˈro͞o, nĕˈ– [key], 1889–1964, Indian statesman, b. Allahabad (now Priyagraj); son of Motilal Nehru. A politician and statesman of great skill, Nehru was e...

light

(Encyclopedia)light, visible electromagnetic radiation. Of the entire electromagnetic spectrum, the human eye is sensitive to only a tiny part, the part that is called light. The wavelengths of visible light range ...

James, Henry, American novelist and critic

(Encyclopedia)James, Henry, 1843–1916, American novelist and critic, b. New York City. A master of the psychological novel, James was an innovator in technique and one of the most distinctive prose stylists in En...

Dickinson, Emily

(Encyclopedia)Dickinson, Emily, 1830–86, American poet, b. Amherst, Mass. She is widely considered one of the greatest poets in American literature. Her unique, gemlike lyrics are distillations of profound feelin...

castle

(Encyclopedia)castle, type of fortified dwelling characteristic of the Middle Ages. Fortification of towns had been in practice since antiquity, but in the 9th cent. feudal lords began to develop the private fortre...

surveying

(Encyclopedia)surveying, method of determining accurately points and lines of direction (bearings) on the earth's surface and preparing from them maps or plans. Boundaries, areas, elevations, construction lines, an...

motion

(Encyclopedia)motion, the change of position of one body with respect to another. The rate of change is the speed of the body. If the direction of motion is also given, then the velocity of the body is determined; ...

electricity

(Encyclopedia)CE5 Electrical and radio symbols electricity, class of phenomena arising from the existence of charge. The basic unit of charge is that on the proton or electron—the proton's charge is designate...

antiparticle

(Encyclopedia)antiparticle, elementary particle corresponding to an ordinary particle such as the proton, neutron, or electron, but having the opposite electrical charge and magnetic moment. Every elementary partic...

aerodynamics

(Encyclopedia)aerodynamics, study of gases in motion. As the principal application of aerodynamics is the design of aircraft, air is the gas with which the science is most concerned. Although aerodynamics is primar...