How fast does light travel?
Light travels at a speed of 299,792 kilometers per second; 186,287 miles per second.
Answered -
Older Answers
The speed of light in a vacuum is 299,792,458 meters per second. Light is slowed down in water, air and glass. ChaCha for now!
Answered by Joel R. -
The accepted speed of light is 186,000 miles (300,000 kilometers) per second. ChaCha for now!
Answered by Renee J. -
Light travels at a constant, finite speed of 186,000 mi/sec. Thanks for using ChaCha!
Answered by Dale E. -
The speed of light is 186,000 miles per second or 299,792,458 meters per second. ChaCha!
Answered by Sarah R. -
Light travels approximately 670,616,629 mph in a vacuum. ChaCha, away!
Answered by Eric T. -
The constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second.
Answered by Jana A. -
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