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Can negative mass be actually positive, by using different point of reference? Like with voltages. One can be positive or negative if you swap "ground".
by varispeed 3y ago
Can negative mass be actually positive, by using different point of reference?
Like with voltages. One can be positive or negative if you swap "ground".
- wholinator2 3y agoWell, i think some trouble lies in that things with 0 mass are already defined here. Light has 0 mass, and anything with 0 mass must move at the speed of light since it has no inertia to stop it. What other point of reference can we use when 0 has been so solidly defined?
- ivanb 3y agoI can give an example. If something moves back in time, it interacts as if it has negative mass relative to us, who move forward in time. Of course nothing moves back in time but tachyons which exist only on paper. The worlds of things moving forward in time and backward in time never meet because they are just two different solutions to the same equation and we have absolutely no evidence that the second world exists. Inverted matter from Tenet should have received negative mass but we most likely will never see it because time may be an illusion likewise to rotation.
- pyuser583 3y agoThank you for your answer
- nyssos 3y agoNo, the gravitational analogue of voltage is the gravitational potential energy. We can freely shift them by constants because absolute potentials are unobservable: only potential differences have physical consequences. Mass, like charge, is directly observable.