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what is speed of light in formula. Distance speed of light time s c t Please enter distance or time the other value will be calculated. Its exact value is defined as 299 792 458 metres per second approximately 300 000 kms or 186 000 mis.
Another way of writing this is. The numerical value in meters per second is known exactly because we use the speed of light to define the meter. The speed of light in a vacuum is 186282 miles per second 299792 kilometers per second and in theory nothing can travel faster than light.
The second has been defined in terms of a frequency transition in Caesium 133.
Another way of writing this is. Speed of light The velocity of the light in the vacuum is The speed of light c 299792458 ms 3 108 ms The velocity of light can be expressed in terms of mph or kms. C speed of light either 30 x 108ms or 30 x 105kms. C 299 792 458 m s.