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Daubigny, Charles-François

(Encyclopedia)Daubigny, Charles-François shärl-fräNswäˈ dōbēnyēˈ [key], 1817–78, French landscape painter. He went to Italy early in life and later studied in Paris with Paul Delaroche. Although usually ...

solar energy

(Encyclopedia)solar energy, any form of energy radiated by the sun, including light, radio waves, and X rays, although the term usually refers to the visible light of the sun. Solar energy is needed by green plants...

nebula

(Encyclopedia)nebula nĕbˈyo͝olə [key] [Lat.,=mist], in astronomy, observed manifestation of a collection of highly rarefied gas and dust in interstellar space. Prior to the 1960s this term was also applied to b...

quantum electrodynamics

(Encyclopedia)quantum electrodynamics (QED), quantum field theory that describes the properties of electromagnetic radiation and its interaction with electrically charged matter in the framework of quantum theory. ...

lens, in optics

(Encyclopedia) CE5 Lenses lens, device for forming an image of an object by the refraction of light. In its simplest form it is a disk of transparent substance, commonly glass, with its two surfaces curved or wi...

Ballia

(Encyclopedia)Ballia bŭlˈyə [key], town, Uttar Pradesh state, N central India. Situated on a rich alluvi...

Russell, Lillian

(Encyclopedia)Russell, Lillian, 1861–1922, American singer and actress, b. Clinton, Iowa. Her original name was Helen Louise Leonard. She first appeared in light opera in 1879. In the early 1880s her introduction...

Richards, William Trost

(Encyclopedia)Richards, William Trost, 1833–1905, American painter, b. Philadelphia, studied in Florence, Rome, and Paris, and settled in Germantown, Pa. Early in his career he painted landscapes and still lifes,...

Saint-Claude

(Encyclopedia)Saint-Claude săN-klōd [key], town (1990 est. pop. 13,265), Jura dept., E France, in Franche-Comté, at the confluence of the Bienne and Tacon rivers. It is a resort that has a variety of light manuf...
 

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