Question

Meaning of SI unit in metre

Answer 1

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Answer:

SI unit symbol is m which means meter. The metre is defined as the length of the path travelled by light in a vacuum in 1299 792 458 of a second. The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole, as a result, the Earth's circumference is approximately 40,000 km.

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