Science Nook

A meter is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299,792,458 when expressed in the unit m/s, where the second is defined in terms of the cesium frequency ΔνCs (the unperturbed ground-state hyperfine transition frequency of the cesium 133 atom).

And now you know how far a meter is.

A foot is the length of some king’s foot.

12 Comments

  1. A foot is 12 inches. An inch is defined by science and official weights and measures as exactly 26.2 millimeters. So we’ve been using the metric system all this time and almost nobody knew.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.