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it should be 3x10^8 m s^(-1). here is the calculation:
we have known that the refractive index of vacuum is 1,
by n= v/c ( n stands for refractive index of medium, v stands for the speed of light in medium, c stands for speed of light constant)
1=v/3X10^8 m s^(-1)
v=
therefore, speed of light in vacuum is 3x10^8 m s^(-1)
actually, all light ray in electromagnetic spectrum have same speed in vacuum
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How does the speed of microwaves compare to the speed of visible light when measured in a vacuum?
They are equal.
How does the speed of visible light compare with the speed of gamma rays when both speeds are maeasured in a vacuum?
If both of them are in the same substance, then their speeds are equal.
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.
How does the average speed of light glass compare with its speed in a vacuum?
About 2/3 its speed in a vacuum.
What is the speed of light in miles per second in a vacuum?
The speed of light is 186,000 miles per second in a vacuum.
How does the speed of microwaves compare to the speed of visible light when measured in a vacuum?
They are equal.
X-rays travel in vacuum at a higher speed than the visible light?
No. Both travel at exactly the same speed. The speed of light.
At what speed does visible light travel?
In vacuum it travels at approx 300,000,000 metres per second.
What light travels the fastest in a vacuum ultraviolet or visible?
The speed of light in a vacuum is the same for any frequency. It is always 3 x 108 meters/second.
Why the velocity x rays is less than the speed of light?
It isn't - at least, not in a vacuum. All electromagnetic waves have the same speed in the vacuum. Both visible light and x-rays are electromagnetic waves.
How does the speed of visible light compare with the speed of gamma rays when both speeds are maeasured in a vacuum?
If both of them are in the same substance, then their speeds are equal.
What is the speed of visible light waves when traveling through air at normal temperatures and pressures?
The speed of light in vacuum is exactly 299.792,458 m / s The speed of light in air is roughly 299,702,458 m / s
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.
Do ultraviolet waves travel at the speed of light in a vacuum?
Ultraviolet and visible light waves all travel at the same speed whenever they're all traveling through the same material.
How does the speed of visible light compare with the speed of gamma rays when both speeds are measured in a vacuum?
The speed of light in glass is the reciprocal of the refractive index of the glass or 1/(refractive index). Not all glass is the same: its refractive index can range from less than 1.5 for Pyrex (a borosilicate glass) to more than 1.9 for (impure) flint glass. This means the speed of light in glass can range between 0.52 and 0.68 of its speed in vacuum.
Does the speed of light change in a vacuum?
No, not as long as the light stays in vacuum.No, it does not. That is where it has its maximum speed.
What travels more quickly visible light or microwaves?
They are both forms of electromagnetic radiation and, in a vacuum, would travel at the same speed.
