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I want to express stress energy tensor for a massless particle. I know that 4-momentum of a massless particle is $k = (E , EV_x , EV_y, EV_z)$ but I don't know how to use $k$ to construct the stress energy tensor.

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  • $\begingroup$ In homework problems, you're supposed to show us how you'e made progress so far. That might lead to some complaints about your question. $\endgroup$ – Carl Brannen Apr 15 at 23:41
  • $\begingroup$ Is this homework? If so, then please add the homework-and-exercises tag, and see the help pages for info on what is expected for homework questions. $\endgroup$ – Ben Crowell Apr 16 at 0:58

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