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speed = distance/time

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you calculate speed by the equation m/sec or cm/sec. This means that you would divide the distance by the time it took.

Actually to measure the speed of light is an interesting and intelligent task done by the scientists. Because the speed of light is 300,000 km in one second which is actually incredible. Out of all those, Michelson's rotating octagonal mirror method is very important. In his experiment the equation to calculate the speed of light is

speed of light = N n D. Here N = 8 as octagonal rotor is used. n - the number of rotations made by the rotor in one second. D - the total distance travelled by light.

Michelson did this experiment keeping the observatory on one mountain, Mt.Wilson and a reflector on another mountain, Mt. Antonio separated by some 35 km.

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15y ago

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