Who first measured speed of light on earth?

Answer 1

Olaus Roemer first measured the speed of light in the 1600s. His findings were not entirely accurate, and would later be modified by James Bradley in 1729. (Source: Msn Encarta)

Answer 2

The first successful measurement of the speed of light on Earth was made by Ole Rømer in 1676. He did this by observing the moons of Jupiter and the delay in their eclipses as the Earth moved further away or closer to Jupiter in its orbit around the Sun.

Answer 3

The first true measurement of light-speed came in 1676 by a fellow named Olaf Roemer. He noted that the time elapsed between eclipses of Jupiter with its moons became shorter as the Earth moved closer to Jupiter and became longer as the Earth and Jupiter drew farther apart. This anomalous behavior could be accounted for by a finite speed of light. He calculated that the speed of light was something like 2.14 x 108 meters per second. This measurement, considering its antiquity, method of measurement, and 17th century uncertainty in exactly how far Jupiter was from the Earth, is surprisingly close to the modern value of 2.99792458 x 108 meters per second. These modern values are obtained using devices called laser interferometers, which can very precicely pin down speeds and distances.

Answer 4

Galileo set up an experiment to measure it. Unfortunately, the answer he got

was worthless, and he knew it right away. It only told him that the speed was

much faster than his experiment was capable of measuring.

Answer 5

Michelson shot pulses of light between mountains. He not only got a very close value but he disturbed the "scientific notion" that "ether" exsisted. It was supposed to be the medium that carried light. He showed that we are not traveling through "ether" as it did not change his speed reading weather he was shooting light with, against or across the supposed stuff in our path.

Answer 6

The first attempt was made by Isaac Beeckman in 1629. However, the first quantitative measurement was made by Ole Rømer in 1676. Over the years, different scientists have improved on the methods of calculating the speed of light.

Answer 7

Michelson was the first man to measure the speed of light accurately.

Answer 8

The first successful calculation of the speed of light was done by Ole Rømer.

Answer 9

Albert Michelson and Edward Morley, in 1887, at what has since become the Case Western Reserve University in Cleveland, Ohio.

Answer 10

The first determination of the speed of light was done by Ole Roemer.