- #1
coktail
- 118
- 1
This is my first post, so forgive me if I'm posting in the wrong place or violating a rule.
I've been doing some reading on relativity, and find myself flummoxed. I understand gravitational time dilation and the principals behind relative velocity time dilation, length contraction, and the relativity of simultaneity.
What I DON'T understand is how these things are ACTUALLY relative without creating paradoxes.
The easy way out of this mess for me is to say, "It's only our perception things that is relative, and that's all we can work with because it's all we have as humans and in science," but that's not what I've read either. People insist it's actual, not just perceived, and that when we take into account things like light propagation, the answer that science has arrived at is that it actually IS relative. But science depends on our measurements, which are always from a reference frame and can't access absolute reality.
I have a feeling the answer coming at me might be something like, "There is no absolute reality! It's all relative, that's the point!" Given that, am I to believe that depending on how many observers there are of a given event, reality actually adapts to accommodate all of them and all of the things they observe (different length contractions, etc...) actually happen, even if they contradict each other and create a paradox. Furthermore, I don't believe the universe will tolerate a paradox because by its very nature a paradox is impossible, and paradoxes abound in relativity. I wish I could include a specific link I found, but it's my first post, so I can't. Just google "why time dilation is impossible" find the one I have in mind.
Would it be fair to say that all the things discussed above are relative to the best of our knowledge because our measurements depend on a field of reference, but that there might still be an absolute reality (outside of human measurement) that we simply cannot talk about scientifically? Or, is our current understand that stuff really does physically change depending on your perspective?
As a side note, I've read that the relativity of simultaneity is supposed to solve the clock paradox and the ladder paradox, but I just don't see how it helps things at all. It doesn't explain to me how A can be greater than and less than B at the same time. Maybe that's the crux of my problems, or maybe that's a separate thread.
As you can see, my brain is kind of whirling, but I've tried to gather my thoughts before posting. Thanks for your help.
-Aaron
I've been doing some reading on relativity, and find myself flummoxed. I understand gravitational time dilation and the principals behind relative velocity time dilation, length contraction, and the relativity of simultaneity.
What I DON'T understand is how these things are ACTUALLY relative without creating paradoxes.
The easy way out of this mess for me is to say, "It's only our perception things that is relative, and that's all we can work with because it's all we have as humans and in science," but that's not what I've read either. People insist it's actual, not just perceived, and that when we take into account things like light propagation, the answer that science has arrived at is that it actually IS relative. But science depends on our measurements, which are always from a reference frame and can't access absolute reality.
I have a feeling the answer coming at me might be something like, "There is no absolute reality! It's all relative, that's the point!" Given that, am I to believe that depending on how many observers there are of a given event, reality actually adapts to accommodate all of them and all of the things they observe (different length contractions, etc...) actually happen, even if they contradict each other and create a paradox. Furthermore, I don't believe the universe will tolerate a paradox because by its very nature a paradox is impossible, and paradoxes abound in relativity. I wish I could include a specific link I found, but it's my first post, so I can't. Just google "why time dilation is impossible" find the one I have in mind.
Would it be fair to say that all the things discussed above are relative to the best of our knowledge because our measurements depend on a field of reference, but that there might still be an absolute reality (outside of human measurement) that we simply cannot talk about scientifically? Or, is our current understand that stuff really does physically change depending on your perspective?
As a side note, I've read that the relativity of simultaneity is supposed to solve the clock paradox and the ladder paradox, but I just don't see how it helps things at all. It doesn't explain to me how A can be greater than and less than B at the same time. Maybe that's the crux of my problems, or maybe that's a separate thread.
As you can see, my brain is kind of whirling, but I've tried to gather my thoughts before posting. Thanks for your help.
-Aaron
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