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Speed of light   /spid əv laɪt/   Listen
Speed of light

noun
1.
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 299,792,458 meters per second.  Synonyms: c, light speed.






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Words linked to "Speed of light" :   light speed, speed, constant, velocity



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