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635 times the speed of light is about 650 times as as The Speed of Light.
In other words, it's 635 times the of The Speed of Light, and the of The Speed of Light is 0.00157480315 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 exactly 299,792,458 m/s, per the formal definition of the meter. While visible light travels close to this speed in air, it slows to 0.666666667 times the speed of light when passing through the glass of a typical window.
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