Light second/Related Articles

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Parent topics

• Speed of light [r]: A physical constant c describing the speed of electromagnetic radiation in vacuum. In the International System of Units the metre is the distance light travels in classical vacuum in 1/c seconds, using the defined value c = c₀ ≡ 299  792  458 m/s (exact). ^[e]

Other related topics

Similar units are the

• Light year [r]: Distance that light travels in vacuum in one year; 9,460,730,472,580.800 km = 9.4607304 * 10¹² km. ^[e]
• Light month [r]: The distance, $7.7706205*10^{14}$ meters, that light travels in one month. ^[e]
• Light hour [r]: Distance that the light travels in vacuum in one hour, 1.0792528 * 10¹²m ^[e]
• Light day [r]: Distance that light travels in a vacuum in one day; 1 light day = 25,902,068,371,200 m = 2.5902067 * 10¹³m. ^[e]
• Light hour [r]: Distance that the light travels in vacuum in one hour, 1.0792528 * 10¹²m ^[e]