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DK Science & Technology: Color

WHAT IS THE VISIBLE SPECTRUM? WHAT ARE PRIMARY COLORS? HOW MANY COLORS CAN WE SEE? DISPERSIONCOLOR TREEFIND OUT MORELight has different wavelengths, which we see as colors. The range of wavelengths…

Ctenophora

(Encyclopedia) CE5 Pleurobrachia, representative of the phylum Ctenophora CtenophoraCtenophoratĭnŏfˈərə [key], a small phylum of exclusively marine, invertebrate animals, commonly known as comb…

Enid GREENE, Congress, UT (1958)

GREENE, Enid, a Representative from Utah; born in San Rafael, Calif., June 5, 1958; graduated from East High School, Salt Lake City, Utah, 1976; B.S., University of Utah, Salt Lake City, Utah…

Thomas Lyon HAMER, Congress, OH (1800-1846)

HAMER, Thomas Lyon, (uncle of Thomas Ray Hamer), a Representative from Ohio; born in Northumberland County, Pa., in July 1800; attended the public schools; moved to Ohio in 1817 and taught…

Austin Augustus KING, Congress, MO (1802-1870)

KING, Austin Augustus, a Representative from Missouri; born in Sullivan County, Tenn., September 21, 1802; attended the public schools; studied law; was admitted to the bar in 1822 and…

Charles Harley MANSUR, Congress, MO (1835-1895)

MANSUR, Charles Harley, a Representative from Missouri; born in Philadelphia, Pa., March 6, 1835; attended Lawrence Academy, Groton, Mass.; studied law and was admitted to the bar in Richmond…

Delany, Samuel R.

(Encyclopedia) Delany, Samuel R. (Samuel Ray Delany, Jr.), 1942–, African-American wrtier, b. Harlem, New York City. Delany uses science fiction, fantasy, and memoir to explore sexual identity, race…

Dodd, William Edward

(Encyclopedia) Dodd, William Edward, 1869–1940, American historian and diplomat, b. Clayton, N.C. He was professor of history at Randolph-Macon College (1900–1908) and at the Univ. of Chicago (1908–…

Compton effect

(Encyclopedia) Compton effect [for A. H. Compton], increase in the wavelengths of X rays and gamma rays when they collide with and are scattered from loosely bound electrons in matter. This effect…

Cushing, Harvey Williams

(Encyclopedia) Cushing, Harvey Williams, 1869–1939, American neurosurgeon, b. Cleveland, B.A. Yale, 1891, M.D. Harvard, 1895. Associated with Johns Hopkins (1896–1912), Harvard (1912–32), and Yale (…