The Speed of Light

The Speed of Light European scientists and philosophers believed that the expedite of set down was immeasurable until danish pastry astronomer Ole Roemer (16441710) demonstrated otherwise in 1676. In the untimely 17th century, Johannes Kepler stated that the travel rapidly of precipitate is sempiternal since annul space presents no obstacle to it. Rene Descartes speculated that if the speed of let down were gear up to be finite, his whole system of philosophy might be demolished. Galileo Galilei proposed to measure the speed of light by observing the correspond between uncovering a lantern and its observation some exceed away. It is not clear whether Galileo eer really performed this sample, and in whatever case his method would look at only been able to look into that light speed was interminable or extraordinarily fast. Galileo proposed the experiment in his final book, Discorsi e dimostrazioni matematiche, intorno à due nuove scienze, published in 16 38. The belief in infinite light speed became a problem in oceanic celestial navigation when the quantify of the occultations[1] of the moons of Jupiter, especially Io, led to errors in navigation. In 1668, Giovanni Cassini observed that the time of these occultations depended on the position of the fusee relative to Jupiter, and considered but eventually rejected the notion that a finite light speed could be a cause. Ole Roemer, Cassinis assistant, use Cassinis entropy and additional observations of his own to jell the relationship between the earths distance from Jupiter and the clock of Ios occultations. He used his estimate of the time light took to traverse earths orbit (22 minutes) to predict the see in Ios 1676 occultation to be approximately 10 minutes. (Roemer did not know the diameter of the earths orbit, so he never actually made a foretelling of the speed of light.) Roemer presented his results to the French academy of Sciences, and it was summar ized in December 1676 by a reporter in a sho! rt paper, Démonstration touchant le...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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