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how do we measure speed of light. How close were you. So how did scientists figure this outSources.
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The experiments to measure the constancy of the speed of light fall in to two categories say Ahmed and co. The speed of light in a vacuum stands at exactly 299792458 metres per second. The speed of light in vacuum commonly denoted c is a universal physical constant important in many areas of physics.
He made a calculation and made a remark that the speed of light is not instantaneous but extremely rapid.
And when an experiment involves lasers its hard to argue with the results. In the 1970s interferometry was used to get the most accurate value for the speed of light that had been measured yet. No seriously we dont measure the speed of light which always refers to the speed in a vacuum. To Einstein no one should ever measure a speed of light that is moving at 15 times the speed of light or at any other speed other than exactly the speed of light.
