light speed, light velocity, velocity of light, luminal speed
kiirus, millega levib elektromagnetkiirgus, sealhulgas valgus, fundamentaalne füüsikakonstant, mille fikseeritud väärtus vaakumis on 299 792 458 m/s, fundamental physical constant the value of which has been fixed at exactly 299 792 458 m/s with the definition of the metre in SI
