In the left image is to see, like particle A calm, peaceful and unsuspecting on-and-off commutes while particle B slowly and sneaky carefully sneaking in from the right. But if we change the angle and slightly to the right offset imagine the top mirror of time, the situation as shown in the right image changed shown: particle B is now the peaceful particle and particle A is stalking at. Which picture corresponds to reality? If an any particles could act as an observer, it would located always own trajectory as estimate exactly vertical and every particle that is inclined to this trajectory as in motion”stamped. So, which image is reality now? Matter of opinion! Or rather relative? -I’m not entirely sure, but the time mirror would have to be a damn good material. Just light waves reflect not rich is like a normal mirror. These are all massive particles, which must be thrown back.
Probably more likely something like little balls. And the recoil would happen exactly at the same speed (with the speed of light) as the impact so yes no energy is lost. Because this is after all our mass energy. And we can’t afford a loss of mass. I would a rubbery When I imagine, I would have to make sure the effects of this whole relativistic laws and the compliance of these laws meticulously monitor… each individual particle at any time: Hey, do you have a mass? Yes? Then you must not move with the speed of light! Yet! Just do it! Not back there to see? Because this particles? Well at the other end of the universe! You have a too rapid movement against this particle. Pull over so please turn right and you? You’re too slow! No mass! Make you get out of here. And while speed of light that has to go with but also easier. Actress often expresses his thoughts on the topic.
Because in the new world eh about speed of light moves, I must watch really even more. I just say: everything what himself has reflected on the membranes a mass, because with each reflection, time passes. Top tack tick, below. The clock is ticking, so to speak. And you don’t get away also this tick. No matter how hard the membranes against moving, no matter how obliquely, a particle flies. At some point it is reflected yet again. So, as I said: all what himself has reflected on the membranes a mass. All that remains between them has no mass. No nitrous, no tack, no time, no mass. Point.