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In a dispersive prism, material dispersion (a wavelength-dependent refractive index) causes different colors to refract at different angles, splitting white light into a spectrum.
Bush took the oath of office on January 20, 2001. He served for the next eight years. Gore has not, as of 2024, considered another presidential run, endorsing Howard Dean 's candidacy during the 2004 Democratic primary and remaining neutral in the Democratic primaries of 2008, 2016 and 2020.
A major technological step was to replace the Morse code by modulating optical waves in speech transmission. Carl Zeiss, Jena developed the Lichtsprechgerät 80/80 (literal translation: optical speaking device) that the German army used in their World War II anti-aircraft defense units, or in bunkers at the Atlantic Wall .
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