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What is the speed of electromagnetic waves in a vacuum?

3 x 10^6 m/s

3 x 10^7 m/s

3 x 10^8 m/s

The speed of electromagnetic waves in a vacuum is precisely 3 x 10^8 meters per second. This value represents the maximum speed at which these waves, including visible light, can propagate through space. This constant, known as the speed of light (denoted as 'c'), is a fundamental principle in physics, particularly in the realm of electromagnetism and relativity.

Understanding this speed is crucial because it establishes limits on how quickly information or energy can be transmitted through electromagnetic waves. The other options provided significantly deviate from this established speed, with the approximate speeds of 3 x 10^6 m/s and 3 x 10^7 m/s being much slower than actual electromagnetic wave propagation, and 3 x 10^9 m/s exceeding the speed of light, which contradicts known physical laws that govern the behavior of light and other electromagnetic radiation in a vacuum.

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3 x 10^9 m/s

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