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The heat ray has been the subject of ongoing debate about its credibility since the Renaissance. René Descartes rejected it as false; [2] a test was conducted by Comte de Buffon (circa 1747), documented in the paper titled "Invention De Miroirs Ardens, Pour Brusler a Une Grande Distance"; and an experiment by John Scott was documented in an ...
The purported device, sometimes called "Archimedes' heat ray", has been the subject of an ongoing debate about its credibility since the Renaissance. [58] René Descartes rejected it as false, while modern researchers have attempted to recreate the effect using only the means that would have been available to Archimedes, mostly with negative ...
Archimedes' investigation of paraboloids was possibly an idealization of the shapes of ships' hulls. Some of the paraboloids float with the base under water and the summit above water, similar to the way that icebergs float. Of Archimedes' works that survive, the second book of On Floating Bodies is considered his most mature work. [6]
The scientists calculated that a huge reflector, made of metallic sodium and with an area of 9 square kilometres (900 ha; 3.5 sq mi), could produce enough focused heat to make an ocean boil or burn a city. [1] After being questioned by American officers, the Germans claimed that the sun gun could be completed within 50 or 100 years.
Legendary accounts of the Siege of Syracuse (213–212 BC) tell of Archimedes' heat ray, a set of burnished brass mirrors or burning glasses supposedly used to ignite attacking ships, though modern historians doubt its veracity. The first modern solar furnace is believed to have been built in France in 1949 by Professor Félix Trombe.
English: Summary of an Archimedes heat ray. In practice, many more mirrors than shown would be needed, and the results may have been merely soldier sweat, temporary blindness, and confusion rather than fire. The mirrors may have consisted of polished metal and had peep-holes drilled in the middle for use in aiming.
Archimedes before his death with a Roman soldier – copy of a Roman mosaic from the 2nd century. Marcus Claudius Marcellus had ordered that Archimedes, the well-known mathematician – and possibly equally well-known to Marcellus as the inventor of the mechanical devices that had so dominated the siege – should not be killed. Archimedes, who ...
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