3 ms·
I think what you are trying to say here is that if both the Earth and Moon reference frame were blinking out a 1-second clock signal via a laser pointer to a ne
by IIAOPSW 2y ago
I think what you are trying to say here is that if both the Earth and Moon reference frame were blinking out a 1-second clock signal via a laser pointer to a neutral 3rd party reference frame, the third party would see pulses at 1-second intervals from both sources.
This is false. Time itself is in fact progressing at a different rate in both frames, and a second in one is not the same as a second in the other.
But, time still "works the same way" for both reference frames in the sense that its not like the clocks in one appear to move in "slow motion". An observer on Earth or the Moon still sees clocks ticking at one second per second, and objects appear to move and react in the ordinary physical ways at the same rate you expect them to. But this is because the observer is also an object in that reference frame, so their perception of everything is in the same "slow motion" as the objects they observe.
Now, if an observer on the Moon was to watch an observer on Earth with a telescope or vice versa, then they would indeed see "the video playing at a slightly wrong speed". The effect is relative between observers, not local to an observer. That's why its called relativity.
- alganet 2y agoThanks! I'm not trying to say anything :D I'm just trying to understand it better. That's why I sprinkled all my comments with healthy doses of "I don't know". I really don't know. The 3rd party seeing blinks at the same rate was just a guess, I'm happy to learn that this guess is false.
- MaxikCZ 2y agoThe fact you mentioned you are talking about your intuitionn not verified knowledge, was what kept the diacussion grounded, thanks for it. Otherwise, as you have been told, your intuition was trully false, and spacetime behaves in some unintuitive ways. Whats weird about it is that it seem to behave differently depending on where you are observing something from, thats cruical. Its all about point of view, literally. Wherever you are (earth, moon, space, near of blackhole), time and space will work normaly for you because you are there. But if you are looking how things are happening somewhere else, it suddenly starts looking very weird. You said that you would be surrounded by time travellers, and you indeed literally are. The boring answer is we are all tkme travelers, but the interesting part of it that if we accelerate differently (one going up the tower while other waits down), their times literally start moving different amounts, and when they meet, one is younger than another. The reason we dont notice is because we keep moving at very, very, very low fractions of speed of light where time dilatation is easy to ignore (must be mathematically compensated for GPS sattelites to even work, tho), but that doesnt mean its not ever-presently there.