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>Mass is not required for gravity; only energy is. E = MC^2 Can't have energy without mass, and mass leads to gravity.
by leptons 2y ago
>Mass is not required for gravity; only energy is.
E = MC^2
Can't have energy without mass, and mass leads to gravity.
- damiankennedy 2y agoThis ignores Planck's energy-frequency relation. Things like photons are affected by gravity as well.
- itishappy 2y agoThe full equation is: E^2 = (p*c)^2 + (m0*c^2)^2. https://en.wikipedia.org/wiki/Energy%E2%80%93momentum_relation https://en.wikipedia.org/wiki/Energy%E2%80%93momentum_relati...
- elashri 2y agoActually it is E^2 = (MC)^2 + (PC^2)^2 The first term is describing the rest mass. You can redefine the mass term to make it E=mc^2 but now this mass does not correspond to the rest mass. And for sure you can have energy without having a rest mass. Actually for the early universe all you had was a form of radiation and energy.
- pdonis 2y ago> E = MC^2 Is only an approximation for particular cases, not a general law.