Please forgive me if I am posting in the wrong forum. Also the board limits the length of the title. I wanted to ask about Effect of high intensity electric and magnetic fields on spacetime. To begin, 15 years ago this was published: http://www.scientificamerican.com/article/do-electric-charges-and-m/ They refer to the "Reissner-Nordstrom" solution to Einstein's gravitational field equations. Basically what gravity would do near the surface of a very strong VanDe Graaf generator. They also mention the solution describing the special case in which the net electric charge is zero is the famous "Schwarzschild solution" to the gravitational field equations. and in this forum 11 years ago we read: https://www.physicsforums.com/threads/magnetic-distortion-of-spacetime.13894/ But I am more interested in what progress has been made in measuring the effect of a strong electric or magnetic field on gravity (and hence spacetime). Is the prediction that it would increase gravity? or decrease it? or change the curvature of space so that gravity changes differently than the square of the radius between two masses? Physical examples are not cited as they would be hard to find. But arent quasars a logical source of high intensity EM emissions? So the obvious question is: Does light bend around a quasar differently than it bends around an equivalently massive but non radiating object?