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Elfie
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This may be a dumb question as I am no expert on this matters but curiosity compells me to ask anyway. Does energy have the same kind of bending effect on spacetime that causes gravity that matter does? Does the E=mc^2 make them interchangable in this regard also? If we implode the Earth ripping apart every atom into energy, but contain this energy in the same amount of space that the mass of the Earth used to occupy does the bending effect the Earth's mass used to have on spacetime remain the same? If the answer is yes -does this mean a massless particle can have a weight?