What is a meter based on the use of?

1 Answer
Jun 13, 2017

It comes from the value for the speed of light.


The speed of light in vacuum is defined to be

#299,792,458# #"m/s"#

This means that light, in a vacuum, will travel a distance of #299,792,458# meters in one second.

The definition of the length of the meter is defined from this value:

One meter is the distance light travels in a vacuum in exactly #1/(299,792,458)# second.