Reply to post: Re: Yep

Three certainties in life: Death, taxes and the speed of light – wait no, maybe not that last one

katrinab Silver badge

Re: Yep

The distance from the North Pole to the Equator via Paris was originally defined as 10,000 km. Then it was based on a standard pole, then on the wavelength of a particular type of light. The number chosen for the speed of light was used to keep it constant with previous definitions.

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