I assume this has something to do with general relativity, but i don’t exactly get it so
In: Planetary Science
in special relativity, the velocity of a massive is no longer proportional to momentum/energy. to closer you get to the speed of light, the more energy you need to invest to raise the velocity for the same amount. the energy cost asymptotically grows to infinity as you get closer.
on the other side, a massless particle can only travel at the speed of light and no other speed, because it has no moment of inertia. even if it has almost no energy, the velocity is still constant.
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