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The fastest that an electromagnetic wave can travel is 299,792,458 meters per second.

That's the "speed of light" ... and all other electromagnetic radiation ... in vacuum.

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βˆ™ 8y ago
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βˆ™ 13y ago

Visible light is a form of electromagnetic wave. As do other electromagnetic waves it travels at 186000 miles/second in vacuum.

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βˆ™ 8y ago

All electromagnetic radiation travels at the same speed. The universal constant 'c'. Commonly called the speed of light.
About 300,000 kilometres per second.

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Q: What is the fastest that an electromagnetic wave can travel?
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All electromagnetic waves travel at the same speed in vacuum.


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