Is 390,000 inches per hour as fast as The Speed of Light?
It's about 0.000000009 times as fast as The Speed of Light
The speed of The Speed of Light is about 42,490,269,611,030 inches per hour.
(C) (in a vacuum)
The speed of light (and all other electromagnetic radiation) in a perfect vacuum is known as "c" and measures 42,490,269,611,030 inches per hour, per the formal definition of the meter. While visible light travels close to this speed in air, it slows to 28,326,846,407,826 inches per hour when passing through the glass of a typical window.
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