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What is the equation for calculating the speed of light in a vacuum?
Wiki User
∙ 8y ago
The easy-to-use equation is: c = 299,792,458 m/s
The somewhat more detailed equation is:
c = the reciprocal of the square root of the product of
(the electrostatic permittivity of vacuum) x (the magnetic permeability of vacuum) .
I almost always use the first one.
Wiki User
∙ 8y ago
Wiki User
∙ 8y agoIt is not something that is calculated. In 1983 it was agreed by all the world's countries that the metre would in future be defined as the distance light travels in 1 second, and the number in the definition is 299,792,458 metres. This gets as close as possible to the old standard gold bar kept in a special room in Paris.
How do we know that won't ever change . . . . that's, as they say, a good question . . . . I suppose they check occasionally, just out of interest . . . .
Wiki User
∙ 11y agofoot and bubble
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In the equation Emc2 what does the 'c' stand for?
Energy equals mass times the speed of light squared. C is the speed of light
What equation is used to determine speed of light through material?
Speed of light in a material = c / (refractive index of the material) . ' c ' = speed of light in vacuum = 299,792,458 meters per second.
What' the equation for speed of light?
The equation is:c = 299,792,458 meters per second in vacuum .For any substance in general:c = (299,792,458 m/s) / (the refractive index of the substance)
What is C in in the equation of atom bomb?
'c' in the equation E=mc2 represents the speed of light (in a vacuum).For more information, see Related links below.
What happens to frequency does the speed of light ever change?
The speed of light IN A VACUUM is always the same. In substances other than the vacuum, the speed of light is usually slower than in a vacuum.
What does the c in the equation e equals mc2?
c is the speed of light in vacuum.
In the equation Emc2 what does the 'c' stand for?
Energy equals mass times the speed of light squared. C is the speed of light
What is the speed of light in a vacuum such as space in equation form?
The Equation is:c = K where'c' = the speed of light'K' = a constant = 299,792,458 meters/second
In the equation e equals mc2 what does the letter c stand for?
The speed of light in vacuum.
What equation represents the velocity of a light?
The speed of light in a vacuum is 300,000 kilometers per second - you don't need an equation for that. Two equations that involve the speed of light are: 1) Speed = wavelength x frequency (this equation applies to any wave, not just light) 2) Snell's law, which relates the speed of light in different substances with the substance's index of refraction. The equation for the speed of light is: c = (299,792,458 meters per second) divided by (refractive index of the medium) The refractive index of vacuum is precisely 1 .
What is energy related to?
According to Einstein's famous equation, it is related to mass and the speed of light (in vacuum).
What is the equation for calculating wave speed?
wave speed= frequency/wavelenth
What is is the equation for calculating average speed?
Speed= distance over time. :)
What equation is used to determine speed of light through material?
Speed of light in a material = c / (refractive index of the material) . ' c ' = speed of light in vacuum = 299,792,458 meters per second.
What is the equation for calculating an object's kinetic energy for seventh grade?
The equation, for 7th. grade or for any other grade, is KE = (1/2)mv2. This is valid as long as the speed does not approach the speed of light.
What is the equation used for calculating average speed?
Speed= distance over time. :)
Why is the speed of light limited in a vacuum?
The speed of light is not limited in a vacuum - the speed of light is fastest in a vacuum. But that is what Einstein called the "Cosmic Speed Limit" - nothing can move faster than the speed of light in a vacuum, or even quite asfast.
