How fast is the speed of light?
Light travels at a constant, finite speed of 186,000 mi/sec. It can circum-navigate the equator approx. 7.5 times in 1 second!
Answered
by Julie B.
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Older Answers
In empty space the speed of light is approximately 300,000 kilometers per second. ChaCha for now!
Answered by William K. -
The speed of light in a vacuum is exactly 299,792,458 metres per second! Thanks for ChaChaing.
Answered by Garrett P. -
How "Fast" is the Speed of Light? Light travels at a constant, finite speed of 186,000 mi/sec. Thank you for using ChaCha!
Answered by Peg Z. -
Light travels at a constant, finite speed of 186,000 miles per second. But not as fast as ChaCha!
Answered by Chris C. -
299,792,458 meters per second, or 186,000 miles per second. ChaCha!
Answered by Han-Yin L. -
The speed of light travels at a finite speed of 186,000 miles per second. Thanks for using Chacha!
Answered by Sam J. -
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About Light Speed
The speed of light in a vacuum is a scientific constant usually noted as 'C.' Its speed is 299,792,458 meters per second or approximately 186,282 miles per second. According to Einstein, E=MC^2, and nothing can travel faster than the speed of light.
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