The Speed of Light

The Speed of Light European scientists and philosophers believed that the expedite of unprovoked was unlimited until danish pastry astronomer Ole Roemer (16441710) demonstrated otherwise in 1676. In the untimely 17th century, Johannes Kepler stated that the upper of demoralize is countless since annul space presents no obstacle to it. Rene Descartes speculated that if the speed of loose were gear up to be finite, his whole agreement 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 invariably really performed this sample, and in whatever case his method would pretend 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 1638. The belief in infinite light speed became a problem in ocean 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 priming 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 fructify the relationship between the earths distance from Jupiter and the time of Ios occultations. He used his estimate of the time light took to traverse earths orbit (22 minutes) to predict the slow up 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 vaticination of the speed of light.) Roemer presented his results to the French academy of Sciences, and it was summarized in December 1676 by a reporter in a short paper, Démonstration touchant le...If you want to get a full essay, order it on our website: OrderEssay.net

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