Question

Write different definitions of metre given by different scientists.​

Answer 1

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$\dashrightarrow$The metre is currently defined as the length of the path travelled by light in a vacuum in 1299 792 458 of a second.

$\dashrightarrow$The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole along a great circle, so the Earth's circumference is approximately 40000 km.

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