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best way to measure the speed of light. The lighting industry uses several different units to measure light depending on what information is needed. To Einsteins way of thinking light always traveled at the same speed and any experiment you didregardless of the time or directionwould measure the same value for this quantity.
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You cant synchronize them without knowing the speed of light which you cant know without measuring. Experiments devised to measure the speed of light involve lasers hitting both rotating and stable mirrors. They defined the meter as the distance light traveled in vacuum for 1299792458 of a second such that the speed of light in a vacuum is drum roll 299792458 ms or 299792458 kms.
The speed of light is 30 108 ms or 300000000 ms.
They covered and uncovered the bright light and calculated the speed of light by measuring the elapsed time until he saw the light from his assistants side. In this video I demonstrated the direct measurement of the speed of light using an off-the-shelve red laser diode and a photomultiplier. The current accepted value for the speed of light in a vacuum is 186282 miles per second. Among other things Einsteins hunch that the speed of light was a universal constant could explain why Michelson and Morley and other experimental physicists hadnt been able to measure any variations in the speed of light.
