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speed of light equation calculator. First determine the speed of light in a vacuum. Light moves at the speed of 299 792 458 meters per second what approximately gives 300 000 kilometers per hour or 186 000 miles per second.
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C is the speed of light in a vacuum 29979 x 10 8 metersecond. Formula n c n Where n Index of refraction c Velocity of light in vacuum n Velocity of light in the medium Refractive index calculation is made easier with this online physics calculator. The unit from the formula is Hz but you can also input KHz.
The above formula is used for calculating the changes that occur when objects approach the speed of light.
This article was most recently revised and updated by Adam Augustyn Managing Editor Reference Content. The equation for frequency is given on the right. Light moves at the speed of 299 792 458 meters per second what approximately gives 300 000 kilometers per hour or 186 000 miles per second. E h c l h f where.
