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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)
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∙ 14y ago
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∙ 15y agoThe 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.
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∙ 10y agoGalileo 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.
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∙ 14y agoMichelson 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.
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∙ 13y agoThe 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.
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∙ 13y agoMichelson was the first man to measure the speed of light accurately.
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∙ 7y agoThe first successful calculation of the speed of light was done by Ole Rømer.
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∙ 7y agoAlbert Michelson and Edward Morley, in 1887, at what has since become the Case Western Reserve University in Cleveland, Ohio.
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∙ 6y agoThe first determination of the speed of light was done by Ole Roemer.
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When did scientists attempt to measure the speed of light?
Are you asking when the speed of light was first estimated, or are you asking when the speed of light was first actually measured?
When was the speed of light measured?
It was measured in 1887.
What is the speed of light in hurtz?
Hz (hertz) is a unit of frequency, not of speed.
Is the speed of light a law or theory?
The speed of light is a number. It was a theory before it was measured. After it was measured, and the prediction was found to be correct, it was no longer a theory nor a hypothesis. It became a "physical constant".
What is the distance from the sun to Earth in hours?
Distance can't be measured in time units unless we know the speed. At the speed of light, the Sun is about 8 1/3 light minutes from Earth. At US interstate highway speed, it's a very long time indeed (at 100 kilometers per hour, it would take you over 170 years to get there).
What is the difference between the speed of light as measured on Earth and as measured on the International space station?
there is none.
Who determined the speed of sound in water?
it was faucault who first measured the speed of light in water ......
How was the speed of light measured?
In light speed.
Where was the speed of light first measured in the US and by whom?
Olaf Roemer
When did scientists attempt to measure the speed of light?
Are you asking when the speed of light was first estimated, or are you asking when the speed of light was first actually measured?
When was the speed of light measured?
It was measured in 1887.
When the speed of light was first actually measured?
ole romer in danmark in 1676 whit a telescoop and a clock
Who were the persons were mesured speed of light?
It was the Danish astronomer, Olaus Roemer, who, in 1676, first successfully measured the speed of light. His method was based on observations of the eclipses of the moons of Jupiter (by Jupiter).
Who first proposed the speed of light is 186000 miles per second?
The expected speed of light fell out of James Clerk-Maxwell's equations, before it was measured and confirmed.
What is the speed of light measured in 'Relativistic Units'?
1
How does the speed of microwaves compare to the speed of visible light when measured in a vacuum?
They are equal.
The light year is measured by?
how far u can travel at the speed of light in a year
