Skip to main content
Constants and units

Constants and units

Why do physicists want to redefine basic units as fundamental constants?

06 Sep 2016
In 2018 the International System of Units will be redefined in terms of fundamental constants. Why t

You’ve reached the limit of what you can view on Physics World without registering

If you already have an account on Physics World, then please sign in to continue reading

If you do not yet have an account, please register so you can

  • Access more than 20 years of online content
  • Choose which e-mail newsletters you would like to receive
Back to Constants and units Constants and units
Copyright © 2026 by IOP Publishing Ltd and individual contributors