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Speed of light in a vacuum is determined by what?

The speed of light (and all other forms of electromagnetic radiation) in vacuum is determined bythe electrostatic permittivity (ε0) and magnetic permeability (μ0) of free space.An interesting thought ... we have no way of knowing whether these physical constants are the samenumbers today that they have always been. If either of them has changed since the birth of the universe,then the speed of light changed, and our observations of the earliest cosmos give an erroneous numberfor the age of the universe.But anyway, that's what these quantities are today, and they're what determines the speed of light,as is so neatly predicted by Maxwell's equations and verified spot-on by the best measurements.


Can someone run faster than the speed of light?

It has been scientifically established that even people from Jamaica cannot run faster than the speed of light.


How can the nature of the source of light wave can influence the speed of light in a vacuum?

The speed of light in a vacuum is constant at about 3 x 10^8 meters per second. The nature of the source of the light wave does not directly influence the speed of light in a vacuum. The speed of light is determined by physical constants in the vacuum, such as the permeability and permittivity of free space.


Can the speed of light be calculated?

Answer: The speed of light was determined through experimentation, such as the timing of moons passing behind Jupiter. Many formulas are based upon the speed of light, but that number had to be determined beforehand. Light travels 299,792,458 meters per second (or 186,282.397 miles per second in a vacuum. Answer: Yes, the speed of light can be deduced from the electrical properties of empty space. However, in practice it is more accurate to measure the speed of light.


What is universal speed limit?

The human speed limit has not yet been identified but one way to be sure is to calculate the energy muscle can provide for our legs. For example, in a 100m race, the amount of kinetic energy can be calculated. Usain Bolt's kinetic energy for the world record is about 369.56J. So, in order the know the max limit of human speed ,just get the max energy our body can provide at an instance.

Related Questions

Why does the speed of light remains same in a black hole?

The speed of light(roughly 186,000 Miles per second) is a universal constant.


Who determined the speed of sound in water?

it was faucault who first measured the speed of light in water ......


Does the gravitation field of the black hole pulled objects in faster than the speed of light?

the answer is no; the speed of light is the universal speed limit, nothing travels faster


What is the highest speed possible for an object to travel?

The universal speed limit for material objects is c : the speed of light in a vacuum.


Is the color of light determied by the speed of the light waves?

the color of light is determined by the ____ of the light waves A. medium B.speed C.frequency D. amplitude


Why speed of light is constant in vaccum?

Because the speed of light is determined by the electrical characteristics of the medium, and the electrical characteristics of vacuum don't change.


The velocity of light represents a cosmic speed?

The speed of light is basically the speed limit in the Universe.


Speed of light in a vacuum is determined by what?

The speed of light (and all other forms of electromagnetic radiation) in vacuum is determined bythe electrostatic permittivity (ε0) and magnetic permeability (μ0) of free space.An interesting thought ... we have no way of knowing whether these physical constants are the samenumbers today that they have always been. If either of them has changed since the birth of the universe,then the speed of light changed, and our observations of the earliest cosmos give an erroneous numberfor the age of the universe.But anyway, that's what these quantities are today, and they're what determines the speed of light,as is so neatly predicted by Maxwell's equations and verified spot-on by the best measurements.


Can someone run faster than the speed of light?

It has been scientifically established that even people from Jamaica cannot run faster than the speed of light.


Does the color of the laser affect the velocity of the light wave projected by the laser?

No, velocity and color are independent. Color is determined by frequency, and speed is determined by what material the light is traveling through.


What is the speed of light through the liquid whose refractive index you have determined?

If the refractive index is k then the speed of light is c/k metres per second where c is the speed of light in vacuum (approx 299,792,458 m/s).


What’s the speed of light?

Light is a "universal speed limit" and, according to Einstein's theory of relativity, is the fastest speed in the universe: 300,000 kilometers per second (186,000 miles per second).