Question #f25e6

1 Answer
Nathan L.
Jul 6, 2017

The SI unit of measurement is the meter (symbol #"m"#)

Explanation:

By fundamental I'll assume you mean something along the lines of "most used" or "most basic" or "most common".

Essentially the answer to all three of these is the meter (#"m"#), which is one of the base SI units of measurement.

The meter is defined as the distance light travels in vacuum in a time period of #1/(299,792,458)# #"second"#.

This value comes from the speed of light in vacuum, defined precisely as #299,792,458# #"m/s"#.

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