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Scott Joplin was an African-American composer and pianist. Joplin achieved fame for his ragtime compositions, and was later titled "The King of Ragtime".
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In 1895, Marconi built a wireless system capable of transmitting signals at long distances (1.5 mi./ 2.4 km). From Marconi's experiments, the phenomenon that transmission range is proportional to the square of antenna height is known as "Marconi's law". This formula represents a physical law that radio devices use.
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Woodward Avenue
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Now known as Sony Music Entertainment.
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Chicago Pile-1 at the University of Chicago.
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