(Encyclopedia) cosmic rays, charged particles moving at nearly the speed of light reaching the earth from outer space. Primary cosmic rays consist mostly of protons (nuclei of hydrogen atoms), some…
(Encyclopedia) Maria FeodorovnaMaria Feodorovnamärēˈä fyôˈdərəvnə [key], 1847–1928, czarina of Russia, consort of Alexander III and mother of Nicholas II. Originally named Dagmar, she was the…
(Encyclopedia) Alexandra FeodorovnaAlexandra Feodorovnafēôˌdərŏvˈnə, Rus. fyôˈdərəvnə [key], 1872–1918, last Russian czarina, consort of Nicholas II; she was a Hessian princess and a granddaughter of…
(Encyclopedia) Celestine V, Saint, 1215–96, pope (elected July 5, resigned Dec. 13, 1294), an Italian (b. Isernia) named Pietro del Murrone; successor of Nicholas IV. Celestine's election ended a two…
PARTS OF THE EYE IMAGE FORMATION FROM EYES TO BRAIN CHANGING PUPIL SIZE COLOUR VISION FIND OUT MORE
Whenever we are awake, our eyes work constantly to collect information about the…
Forces, Particles, and Some Cosmological GlueTheories of the UniverseForces, Particles, and Some Cosmological GlueSize in the MicrocosmThe Forces You Already KnowThe Particle ZooThe Last Train to…
Born: 1889Birthplace: Murom, Russia Cathode ray tube—Zworykin invented the iconoscope, a television transmitting tube and the kinescope, a cathode ray tube that projects pictures it receives onto a…
Born: 1926Birthplace: New York City Diagnostic x-ray systems—Ledley developed the ACTA diagnostic x-ray scanner, the first whole-body computerized tomography (CT) machine. He was the first to do…
(Encyclopedia) Giacconi, Riccardo, 1931–2018, Italian-American astrophysicist, b. Milan, Italy, Ph.D. Univ. of Milan 1954. He was a researcher at American Science and Engineering Corporation (1959–73…
(Encyclopedia) Karle, JeromeKarle, Jeromekärl [key], 1918–2013, American physicist, b. New York City, Ph.D. Univ. of Michigan, 1943. He worked on the Manhattan Project before beginning a career (1946…
