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As best we can tell, yes. If Maxwell's Equations apply in all parts of our Universe, then the vacuum propagation speed of EM radiation (ie, light) will be the same in all parts of our Universe. We have no reason to think that our small portion of our Universe has different physical laws than other parts.

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Q: Is speed of light a universal constant?
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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.


Why constant is used?

Constant is the speed of light and as the speed of light cannot change it is 'constant'


Why use constants?

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What does special relativity say about the speed of light?

The speed of light is constant.


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How many seconds does it take to make a mile?

Since the speed of light, c, in vacuo is 186, 282.397 miles/sec and c is a universal constant, there is 1/c second per mile referenced to the speed of light.


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What is the constant speed at which light and other forms of radiation travel?

The constant speed at which light travels is 300M m/s.


Is the speed of light a constant?

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Is speed of light constant?

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Which of these is constant for ALL types of electromagnetic radiation 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.


Is the speed of light constant in a vacuum?

Yes