1A10.30 • Basic Units: Standard of Length

Photo shows the demonstration used at the University of Texas at Austin.

Concepts Conveyed:

• The one meter bar has been compared with the National Bureau of Standards of the United States.
• The length of the bar from zero to the one meter line at 20 deg C is 1000.068 millimeters.
• The value for the length of the bar at 20 deg C is not in error by more than 0.002 mm.
• Maker of bar: Societe Genevoise.
• Date bar was tested and calibrated: November 9, 1938.

Instructions / Notes:

• One meter stick is provided.

Last updated on July 25, 2024