# What is a meter based on the use of?

##### 1 Answer

Jun 13, 2017

#### Answer:

It comes from the value for the **speed of light**.

#### Explanation:

The speed of light in vacuum is *defined* to be

This means that light, in a vacuum, will travel a distance of

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**.