Quick question about curvation of spacetime

[joris_pixie]

I have been studying up on special and general relativity lately :)
But still a few things aren't clear to me (obviously)

Is it energy and mass that curves it or only mass?
Or putted otherway does a photon curve spacetime ?Edit: I think I figured it out, it's indeed energy that curves space and time :)
So photons do curve it.

But an confirmation would be nice ! :)

 

[pervect]

I have been studying up on special and general relativity lately :)
But still a few things aren't clear to me (obviously)

Is it energy and mass that curves it or only mass?
Or putted otherway does a photon curve spacetime ?


Edit: I think I figured it out, it's indeed energy that curves space and time :)
So photons do curve it.

But an confirmation would be nice ! :)

Yes, energy (and momentum, and pressure) all curve space-time, so photons (or, because GR is a classical theory, it's better to say light) curves space-time.