The length of the path travelled by light in a vacuum during a time interval of 1/299,792,458 of a second
by America Lover 🇺🇸 November 17, 2018
The distance light travels in 1/x of a second, where x is 299,792,458—the length is measured in terms of the speed of light (x m/s), which never changes.
Since one meter was defined to be 1/10,000,000 (or one over 10 million) the distance from the North Pole to the Equator in 1793, the meter had since undergone a few definitional changes before its present official definition was agreed in 1983.
by Fasters March 23, 2023
Meters-
A metre (m), also spelled meter, in measurement, fundamental unit of length in the metric system and in the International Systems of Units (SI). It is equal to approximately 39.37 inches in the British Imperial and United States Customary systems. The metre was historically defined by the French Academy of Sciences in 1791 as 1/10,000,000 of the quadrant of the Earth’s circumference running from the North Pole through Paris to the equator. The International Bureau of Weights and Measures in 1889 established the international prototype metre as the distance between two lines on a standard bar of 90...
- Encyclopædia Britannica
A metre (m), also spelled meter, in measurement, fundamental unit of length in the metric system and in the International Systems of Units (SI). It is equal to approximately 39.37 inches in the British Imperial and United States Customary systems. The metre was historically defined by the French Academy of Sciences in 1791 as 1/10,000,000 of the quadrant of the Earth’s circumference running from the North Pole through Paris to the equator. The International Bureau of Weights and Measures in 1889 established the international prototype metre as the distance between two lines on a standard bar of 90...
- Encyclopædia Britannica
by Miskatonic Jack 2 November 21, 2010
by Belinda h. December 7, 2003
by jako July 27, 2003
by George Buurman February 26, 2004