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Lancaster, John of, duke of Bedford

(Encyclopedia)Lancaster, John of, duke of Bedford: see Bedford, John of Lancaster, duke of. ...

John of Lancaster, duke of Bedford

(Encyclopedia)John of Lancaster, duke of Bedford: see Bedford, John of Lancaster, duke of. ...

District of Columbia, University of the

(Encyclopedia)District of Columbia, University of the, at Washington, D.C.; coeducational; land-grant and federally supported; est. 1976 with the merger of three existing colleges; predominantly African American. I...

Protocols of the Elders of Zion

(Encyclopedia)Protocols of the Elders of Zion, a fraudulent document that reported the alleged proceedings of a conference of Jews in the late 19th cent., at which they discussed plans to overthrow Christianity thr...

Field of the Cloth of Gold

(Encyclopedia)Field of the Cloth of Gold, locality between Guines and Ardres, not far from Calais, in France, where in 1520 Henry VIII of England and Francis I of France met for the purpose of arranging an alliance...

Lancaster, John of Gaunt, duke of

(Encyclopedia)Lancaster, John of Gaunt, duke of: see John of Gaunt. ...

Aymer of Valence, earl of Pembroke

(Encyclopedia)Aymer of Valence, earl of Pembroke: see Pembroke, Aymer de Valence, earl of. ...

photoelectric effect

(Encyclopedia)photoelectric effect, emission of electrons by substances, especially metals, when light falls on their surfaces. The effect was discovered by H. R. Hertz in 1887. The failure of the classical theory ...

Bernardin de Saint-Pierre, Jacques Henri

(Encyclopedia)Bernardin de Saint-Pierre, Jacques Henri zhäk äNrēˈ bĕrnärdăNˈ də săN–pyĕrˈ [key], 1737–1814, French naturalist and author. He was a friend of Rousseau, by whom he was strongly influen...

image

(Encyclopedia)image, in optics, likeness or counterpart of an object produced when rays of light coming from that object are reflected from a mirror or are refracted by a lens. An image of an object is also formed ...