Define one meter..........................
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meter. The basic unit of length in the metric system; it was originally planned so that the circumference of the Earth would be measured at about forty million meters. A meter is 39.37 inches. Today, the meter is defined to be the distance light travels in 1 / 299,792,458 seconds.
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In 1983, the meter was redefined in terms of speed of light according to which one meter is the distance travelled by the light in 1/299,792,458 of a second in air or vacuum.
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