- #1
Rory9
- 13
- 0
Hi,
I believe you can use the "energy-momentum tensor" to express the conservation of both energy and momentum for fields ([tex]\partial_{\mu} T^{\mu \nu} = 0[/tex]). But I'm wondering: why's a tensor needed, specifically, to describe this conservation of energy and momentum for fields? For particles, I believe a four-vector suffices (?). I'm not quite clear on this.
Thanks in advance for your wisdom. :-)
I believe you can use the "energy-momentum tensor" to express the conservation of both energy and momentum for fields ([tex]\partial_{\mu} T^{\mu \nu} = 0[/tex]). But I'm wondering: why's a tensor needed, specifically, to describe this conservation of energy and momentum for fields? For particles, I believe a four-vector suffices (?). I'm not quite clear on this.
Thanks in advance for your wisdom. :-)