# Einstein's Field equations and impulse-energy tensor

I premise that I haven't yet studied General Relativity, but in Relativistic Electrodymaics I have knowed impulse-energy tensor of Electromagnetic Field.

I know in Einstein's equations there is impulse-energy tensor $T_{\mu\nu}$ too:

$$R_{\mu \nu} - {1 \over 2} g_{\mu \nu} R + \Lambda g_{\mu \nu} = \frac{8 \pi G}{c^4} T_{\mu \nu}$$

I suppose that it's connected with matter in the space, being that equation about gravitation theory.

My question is: has got any sense put in the Einstein's field equation the impulse-energy tensor of EM field? If yes, what is the physical meaning? What are the consequences?

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The stress-energy tensor $T_{\mu\nu}$ on the right side of the Einstein equation characterizes all of the various forms of "stuff" in the spacetime. If there are electromagnetic fields in the spacetime, then the stress-energy tensor of the electromagnetic field is part of that $T_{\mu\nu}$, along with contributions from other forms of energy, mass, etc.