Gravity and massless particles

  • #1
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Just finished reading Sean Carroll's "The Higgs Boson and Beyond". I would be grateful if someone could explain how gravity, which I understand to be a function of mass, can interact with massless particles as evidenced by the phenomenon of gravitational lensing. I understand that gravity is a local curvature of spacetime and photons move through spacetime so that makes sense. Is the explanation as simple as that?

Thanks and regards.
 
  • #3
Yes but would massless particles like photons moving through space make gravity.
So in effect could massless particles moving through space time attract each other.
 
  • #5
would massless particles like photons moving through space make gravity.
Yes. In general relativity, the "source" of gravity is the stress-energy tensor, whose components contain the energy and momentum of an object. Mass is only one form of energy.
 
  • #6
Energy mass equivalence, gravity can also therefore be described as a function of energy.
 

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