Recent content by tnadys

This may be a stupid question, but I have been curious about it for awhile. Before string theory, extra dimensions seem not to be taken seriously. But if gravity warps space doesn't it need another dimension to warp into? I saw Brian Green on TV and I thought he suggested that you don't, but he...

It seems to me that this is only philosophy if we don't and can't ever know the answer. If the universe is deterministic or not seems like a fundamental property of nature that in principle should be knowable. We will never be able to predict the future (to complex) either way, but we should be...

I just found the thread "Is everything deterministic" which covers this

I always assumed the Heisenberg Uncertainty Principle prevented the universe from being Deterministic, but, it that even true?

I have always had a problem with the concept of "you can't know" and because of that I have always had a problem with the uncertainty principle. Because people much smarter than me have fought this issue longer than I have been alive, and I because am not really qualified to have an opinion I...

Is my problem that I am thinking in 3d plus time instead of treating it like 4 spatial dimensions? I really have no problem with the time dilation aspect. It has been demonstrated and isn't really in dispute. The basic problem is in the frame of reference aspect. If I speed away from earth, it...

Thanks to all the people who responded. I think, I at least understand why I didn't understand. It does sort of seem like a consequence of math, rather than reality :o But given all the other strange things we have found out about the universe maybe not. I am a programmer, not a physicist. In my...

It feels like we are going in circles here. If I leave the Earth at the speed of light then come back time has slowed for me not earth. I'm not sure what acceleration has to do with anything. While I am traveling time appears to slow for the Earth from my perspective and for me from their...

But say you can accelerate almost instantly, so that virtually all the travel time is at a constant velocity. Then the acceleration is an insignificant part of the trip. Another approach is to return at a normal velocity so that time dilation is insignificant. The time effects from the first...

I'm still not really getting it. I understand that point about it being from the perspective of the observer, but if I come back to Earth and stop, time has slowed for me not earth. I guess I don't get the relative part.

A couple questions. Assume that you can travel arbitraily close to the speed of light and that you have figured out how to communicate via Quantum entanglement (Like Ender's Game). I speed away from Earth at almost the speed of light. At the point when I stop accelerating, is it not valid...