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In 1676, the Danish astronomer Ole Roemer (1644–1710) became the first person to measure the speed of light. Roemer measured the speed of light by timing eclipses of Jupiter's moon Io. In this figure, S is the Sun, E1 is the Earth when closest to Jupiter (J1) and E2 is the Earth about six months later, on the opposite side of the Sun from ...
There is no evidence that Rømer thought that he was measuring c ⁄ v: he gives his result as the time of 22 minutes for light to travel a distance equal to the diameter of Earth's orbit or, equivalently, 11 minutes for light to travel from the Sun to Earth.
1 de dic. de 2004 · Ole Rømer’s 1676 demonstration that light propagates at a finite speed must have been a revelation to the members of the French Royal Academy of Science. A young and brilliant Danish “postdoc” at the Paris Observatory, Rømer had unexpectedly answered a long-standing fundamental question.
20 de feb. de 2018 · Ole Rømer did not measure a change in the frequency of light. He measured an apparent change in the orbital period of Io, one of Jupiter's moons. The orbit of Io can be measured very accurately by observing when it enters or leaves the shadow of Jupiter.
Ole Roemer, Danish astronomer who demonstrated conclusively that light travels at a finite speed. This was accomplished when he accurately predicted the eclipse of Io in November 1676. Roemer later served as Denmark’s royal mathematician. Learn more about his life and work.
15 de abr. de 2010 · Ole Rømer, a Danish astronomer, calculated the speed of light by observing the eclipses of Jupiter's moon during the years 1668–1674. A discrepancy was observed for the time between the eclipses, increasing when the Earth was moving away from Jupiter and decreasing when the Earth was approaching.
1676: Ole Rømer Measures the Speed of Light. Light travels so amazingly fast that it was very difficult to measure its speed. The first person to succeed was Danish astronomer Ole Christensen Rømer. His accomplishment was an essential step in developing an understanding of the universe.
