- #1

actionintegral

- 305

- 5

I see where there is a relationship between energy and momentum in

[tex]E=\frac{p^2}{2m}[/tex]

Ok. And I also see where there is a different relationship between energy and momentum in

[tex]E^2 = p^2c^2 + (m_{0}c^2)^2[/tex]

fine. So there must be some abstract concept where E=E(p) in general. What is that concept called? And what do I search on to learn about it?