Hey(adsbygoogle = window.adsbygoogle || []).push({});

If you have the Minkowski line equation of

-ds^2 = c^2 d tau^2 = c^2 dt^2 - dx^2 - dy^2 - dz^2

I don't understand how you can assume from this ^ that each observer in different reference frames will experience time changing at the same rate 'dt'. I thought that tau was the relative time experienced by each observer depending on their relative velocity :S

Am I getting confused?!

Thanks :-)

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# The Universal Time Coordinate

**Physics Forums | Science Articles, Homework Help, Discussion**