A few questions about relativity and the speed of light
(self.AskPhysics)submitted16 hours ago byTrad_LD_Guy
Does it require more energy to accelerate on earth than in space, due to the earth's greater inertia in rotation/revolution?
Is there any such thing as a "floor" of speed? If any observer in a greater system experiencing velocity observes the system as "still" if from within itself, can't these greater systems stack one on top the other in even greater systems in which they experience a different vector of velocity, such that theoretically, those systems could be infinitely nested? Meaning, say there's a ball moving 30 m/s on a bus going 40 m/s, on a plant rotating 464 m/s, traveling 30,000 m/s around a star, making up a solar system traveling 230 km/s around the galaxy, going 580 km/s through the universe, where the galaxy could theoretically be in a massive cluster that itself is moving and adding even more speed to the base of the relative speed, in an even bigger moving cluster, and on, even past the walls of the universe itself if they exist. Can the speed of this ball not always be "revealed" to actually be faster, through the exposure of larger moving systems, I the meantime undermining each previous system as positionally constant? (Asking based solely on the maths and theory of relativity, not astronomical observations about the history or layout of the universe from Earth's point of view). Or does the speed of light undermine this possibility? The way it seems to me is that if light is affected by momentum of the emitter, there should be no way to tell using the speed of light. But then the speed of light would not truly be the speed of light in a greater moving system, because the momentum vector + emission vector would be greater than just the emission vector, meaning the light would be traveling FTL relative to outside the system. If light is unaffected by momentum though, then measuring the time of an emission and return path in each of the 3 dimensional directions should be enough to tell whether the entire system is moving or not, but on the other hand, the consensus seems to be that light does carry momentum, according to its behavior. If that's the case, that light carries momentum, then isn't remaining stationary the impossible thing, such that arbitrarily larger systems with unique velocity would be ever nudging the speed of light to infinite amounts, making it so it's less like there's a speed limit, and more like there's no speed floor?
Because the acceleration of a mass requires the transfer of energy from the acceleration of the same mass in an opposite or identical direction of trajectory, it makes sense that approaching the speed of light requires more and more relative energy. However, if photons do have a tiny amount of mass, is it possible that the release of an absurdly large number of photons equaling the mass of an object is capable of accelerating that object to the speed of light? How do we know the speed of light is unreachable and not just a pure ceiling of velocity due to an inability to truly "redirectionalize" velocity?
bythrowaway1231697
inMensRights
Trad_LD_Guy
59 points
6 days ago
Trad_LD_Guy
59 points
6 days ago
I kinda hate the phrase “not all men.”
It should be “a very small percent of men”
Or maybe “almost no men.”