What is the speed of light in a vacuum?
Category: Science · Difficulty: easy
Hint: It's a very fast number!
Answer
299,792 kilometers per second
Explanation
The speed of light in a vacuum is 299,792 kilometers per second, which is the fastest speed in the universe.
This is an easy science riddle — a good one for children and beginners. The answer is 299,792 kilometers per second.
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