Einstein's Clock
- Thread starter What Would Jesus Do?
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Wouldn't that explanation only apply if you are at the center of the universe?
If your frame of reference (Earth in this case) is already moving away from the center of the universe - big bang, expansion, and all that - wouldn't your clock already run a bit slow, because it's not stationary?
Would you speed up you clock if you sent your rocketship toward the center of the universe - because that would be slowing down the motion of the clock relative to that center? Or would you further slow it down?
If your frame of reference (Earth in this case) is already moving away from the center of the universe - big bang, expansion, and all that - wouldn't your clock already run a bit slow, because it's not stationary?
Would you speed up you clock if you sent your rocketship toward the center of the universe - because that would be slowing down the motion of the clock relative to that center? Or would you further slow it down?
I have one and while it can be an interesting conversation piece when guests visit I really don’t find it to be all it’s cracked up to be.
Is that an analog Einstein clock or a quantum Einstein clock?I have one and while it can be an interesting conversation piece when guests visit I really don’t find it to be all it’s cracked up to be.
Aren't most clocks really Schrodinger clocks? They only resolve the time when you look at them.
Or maybe they're all really Heisenberg clocks. Sure they measure time but they are always wrong because measuring time changes it.
Nah, it’s everywhere. The closer you get to the speed of light the slower time moves. So if you flew away from earth at 99.9999% the speed of light, and then flew back. It would be like traveling into the future.
To the 1st paragraph, no. The speed is relative. So, on Earth, both clocks are moving at the same speed, so both clocks tick in the same time. It's when you speed up one clock in relation to the other that the moving clock slows down.
For reference, if you were able to move at the speed of light, time would barely move relative to a clock on earth. However, in both cases, both clocks feel time moving the same, it's just when you compare time in relation to each other there is a difference.
Note, higher gravity has a similar effect. It's why Miller's planet in Interstellar time moved roughly 7 years on earth to 1 hour on Miller's planet. Speed and gravity do similar things.
Not BS. It's been observed in colliders. If you traveled to Alpha Centauri and back at just under the speed of light, the observed trip (from earth) would be around 8 years 10 months, however you would have aged around 1.5 - 2 months.
Time dilation is real. And, FTR, GPS satellites are programmed to adjust for time dilation because they are moving faster, in less gravity, than the GPS units on earth are.
It’s why you’d never get sucked into a black hole. You’d get stuck at the event horizon.
They talk about the effect of falling into a black hole, and then later the Hawking radiation and event horizon.
He didn't say it was time travel, he said it was like traveling into the future. It's not a wrong way to describe time dilation, which is real. You travel faster than someone else, they are, technically, aging more than you are. That's "like" traveling forward in time, considering you get to the same point in space/time while aging less.
And again, that is a fact, it happens and it's been observed in real life.
We’re all time traveling, dude.
All I’m saying is there’s a way to make it go faster.
This is correct. GPS Satellites have to be adjusted accordingly because they are further from the earths mass and traveling faster which based on theory of relativity makes time continue at a slightly different speed. .
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Yep. Although, in the case of the satellites, we're talking microseconds to milliseconds difference. Nothing like traveling at tenths of the speed of light, which would be required for interstellar travel. Well, unless we figure out wormholes, but that would require dark energy, which no one is really sure how that works let alone how to use it.
This is why I like to remain on the couch as much as possible. You can't get the time back when you start moving around too fast.
Time is entirely relativistic. There's a number of ways to "travel through time" as we perceive it. The movie interstellar touches on this idea a bit.
As mentioned above, it is speed that modifies the way that time affects an object. For reference:
Location in the universe shouldn't matter to this with the exception of our understanding of how dark energy works in universal expansion. This is all theoretical still but essentially the distance relative to the center of the universe should be (mostly) irrelevant other than measuring how long it might take for something to travel from point a to point b due to more space expanding as a constant via dark energy in between those points. That expansion shouldn't impact the way time actually passes for that object though, only the duration of time that would be required to travel that distance.
Yep
If you were able to travel away from Earth at extremely high speed, then turn around and come back, you'd age a few years while everyone on Earth would age hundreds of years. That aspect of Interstellar was well-done.
Sure, an average slowdown makes sense. But are they uniformly slower, or does the slowdown vary depending on what part of the orbit they are in? Based on the movement of the Earth in orbit around the sun, in case the reasoning wasn't clear.
Part of the train example is unclear to me.
In the baseball portion of the train scenario, the perceived speed of the ball from the perspective of the guy on the ground is 100mph. Which makes sense because the train is going 50 and the ball is thrown at 50 so you get 50+50=100.
It's stated that the guy on the train sees the ball moving at 50. That also makes sense. But we know the actual speed is 100.
In the photon portion of the train scenario, the perceived speed of the photon from the perspective of the guy on the ground is c. Not c+50. Because photons can't travel faster than c.
But if photons can't travel faster than c, why does the video say that the guy on the train also perceives the photon moving at c? Shouldn't he see it moving at c-50?
Not 100% sure if this is what you're asking, but...the part of the earth's orbit around the sun we're in won't affect the time adjustments for satellites. Only the speed relative to earth and distance (different gravity) from earth will affect it.
