The speed of light is a constant, C= 300,000 km per second.
They are equal.
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.
If both of them are in the same substance, then their speeds are equal.
About 2/3 its speed in a vacuum.
The speed of light is 186,000 miles per second in a vacuum.
They are equal.
"c" in this case means the speed of light in a vacuum. This is approximately equal to 300,000 km per second.
No, speed of sound in air is much slower than the speed of light in 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.
The substance's index of refraction isSpeed of light in vacuum / Speed of light in the substance
No, not as long as the light stays in vacuum.No, it does not. That is where it has its maximum speed.
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.
Answer = Velocity Velocity is the speed of light and, the speed of light, is a constant among Electromagnetic Radiation in the vacuum of space.
If both of them are in the same substance, then their speeds are equal.
In vacuum, the speed is 299,792,458 meters per second.
About 2/3 its speed in a vacuum.
When light with wavelength of 589 nanometers moves through water at the temperature of 20° C, its speed is 75% of the speed of light in vacuum.