Bleeps and Blips to Rocket Ships

Bücher

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Our fast-paced world of fax machines, digital cameras, and cell phones is possible because of the work of inventors who paved the way for modern communications.Meet:Reginald Fessenden, who thought of a continuous wireless signal when he noted the ripples resulting from a rock he tossed in a lake, Alexander Graham Bell, who made his famous call - "Mr. Watson, come here! I want you!" - because he had spilled acid onto his trousers, William Stephenson, inventor of the wirephoto, who was a spy during the Second World War.From newsprint to fiber optics, discover ten great inventions in this fascinating book, and a great resource for science projects and science fairs:• Make your own paper• Create your own halftone image• Make your own pinhole camera• Make a telegraph• Use Morse code• Make a light fountain