n. the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299792458 meters per second
The speed of light is the speed at which light travels in a vacuum.
The speed of light is the speed at which light travels in a vacuum.
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How long would it take a starship to fly at the speed of light across the Milky Way Galaxy?
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If you could travel at the speed of light how long would it take to get to the Moon and back?
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What is the speed of light and how fast is that?
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light speed; c; speed at which light travels
speed of sound
1 syllables
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