- #1
shadi_s10
- 89
- 0
dear all,
I have a question about Electromagnetic field tensor.
As I was reading introduction to relativity by Hobson, I saw this sentence:
"in order that the rest mass of a particle is not altered by the action of the erforce we require the latter to be a pure force, so:
u.f=0
1) what does it mean?
The other question is about the rest of this text:
in the component form this reads:
f_μ u^μ=q F_μσ u^μ u^σ=0
so that F must be an anti symmetric tensor. 2) why?!
I have a question about Electromagnetic field tensor.
As I was reading introduction to relativity by Hobson, I saw this sentence:
"in order that the rest mass of a particle is not altered by the action of the erforce we require the latter to be a pure force, so:
u.f=0
1) what does it mean?
The other question is about the rest of this text:
in the component form this reads:
f_μ u^μ=q F_μσ u^μ u^σ=0
so that F must be an anti symmetric tensor. 2) why?!