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Metre

metre-1753073720487-dbf3db

Description

The metre is the base unit of length in the International System of Units (SI). Since 2019, the metre has been defined as the length of the path travelled by light in vacuum during a time interval of ⁠1/299792458⁠ of a second, where the second is defined by a hyperfine transition frequency of caesium.

ID: metre-1753073720487-dbf3db

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