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8 kilometers per hour is about 0.000000008 times as fast as The Speed of Light
In other words, it's 0.00000000741253544884780 times the speed of The Speed of Light, and the speed of The Speed of Light is 134,906,606.10 times that amount.
(C) (in a vacuum)
The speed of light (and all other electromagnetic radiation) in a perfect vacuum is known as "c" and measures 1,079,252,848.80 kilometers per hour, per the formal definition of the meter. While visible light travels close to this speed in air, it slows to 719,501,899.2120 kilometers per hour when passing through the glass of a typical window.
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