Given that we don't know exactly how long a meter is (a meter is measured in relation to the speed of light), what is the smallest distance we can measure in terms
![The kilogram is the SI base unit of mass and is equal to the mass of the international prototype of the kilogram , a standard that is kept at the International Bureau The kilogram is the SI base unit of mass and is equal to the mass of the international prototype of the kilogram , a standard that is kept at the International Bureau](https://dwes9vv9u0550.cloudfront.net/images/2970734/151db583-4b22-4779-855c-2e35418b7123.jpg)
The kilogram is the SI base unit of mass and is equal to the mass of the international prototype of the kilogram , a standard that is kept at the International Bureau
![The Ontario high school physics. ^, the yard and the metre. The yard is said to have represented, originally, the lengthof the arm of King Henry I., but such a definition The Ontario high school physics. ^, the yard and the metre. The yard is said to have represented, originally, the lengthof the arm of King Henry I., but such a definition](https://c8.alamy.com/comp/2CEHG1T/the-ontario-high-school-physics-the-yard-and-the-metre-the-yard-is-said-to-have-represented-originally-the-lengthof-the-arm-of-king-henry-i-but-such-a-definition-is-not-byany-means-accurate-enough-for-present-day-requirements-it-the-metre-fiq-1bronze-yard-38-in-long-1-in-sq-in-sectiona-a-are-small-wells-in-bar-sunk-to-mid-depth-is-now-defined-as-the-distance-between-the-centres-of-twotransverse-lines-ruled-on-two-gold-pings-in-a-bronze-barwhich-is-preserved-in-london-england-in-the-standardsoffice-of-the-board-of-trade-of-great-britain-the-bronze-bar-is-38-inches-l-2CEHG1T.jpg)