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The meter is the fundamental unit of length in the International System of Units (SI). Originally intended to be one ten-millionth of the distance from the Earth's equator to the North Pole (at sea level), its definition has been periodically refined to reflect growing knowledge of metrology. Since 1983, it has been defined as "the length of the path traveled by light in vacuum during a time interval of 1/299,792,458 of a second."

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11y ago
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5mo ago

The meter was originally defined as one ten-millionth of the distance from the equator to the North Pole, making it a universal standard of measurement that is not dependent on any specific country or culture. This definition was later updated to be based on the speed of light in a vacuum, which provides a more precise and consistent measurement.

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10y ago

The word come from the Greek metron which means a unit of measure.

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Q: Why is a meter as long as it is?
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