In a nearby thread: I believe it was correctly concluded "yes" because an electromagnetic (EM) field has energy and pressure so it curves spacetime; it does have a gravitational effect. Although it was not discussed, this effect is much, much smaller than the electromagnetic effects because we know gravity is really weak under most conditions. Ok, so along comes an EM field and bends space. We would normally think that because there is only an electromagnetic field present, that only charged particles would be deflected by the normal interactions. But if spacetime is curved, then ALL particles, charged or not, should be also be deflected since spacetime is curved. I never heard of such a thing! Maxwell's equations don't say anything about this, do they? Comments??? Corrections?