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Electromagnetic radiation is the fastest known information carrier, and according to relativity and modern physics, it's the fastest possible. The term 'electromagnetic radiation' includes AM and FM radio, TV, microwave radio, microwave cooking rays, heat, visible light, ultraviolet, X-rays, and several others. All of these are the same physical phenomenon; they differ only in wavelength (frequency), and they all travel at the "speed of light" ... about 300 million km (186 thousand miles) per second.

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15y ago

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