- #1
ngkamsengpeter
- 195
- 0
Since theory of relativity predit time dilation effects . So does it mean that we can travel backwards or forward in time ?
That argument doesn't make sense in terms of the spacetime viewpoint--the atoms that compose your body don't have to rearrange themselves into an earlier state, rather they just have to move to the region of spacetime where the earlier versions of themselves still were in that state, so the older version of you can interact with the younger version. Think of a block of solid ice with various 1-dimensional strings embedded in it--if you cross-section this block, you will see a collection of 0-dimensional points (the strings in cross-section) arranged in various positions on a 2-dimensional surface, and if you take pictures of successive cross-sections and arrange them into a movie, you will see the points moving around continuously relative to one another (in terms of this metaphor, the idea that different frames define simultaneity differently means you have a choice of what angle to slice the ice when you make your series of cross-sections). You shouldn't think of time travel as the points returning to precisely the same configuration they had been in at an earlier frame of the movie; instead, you should just imagine one of the strings curving around into a loop within the 3-dimensional block.Chronos said:No. It merely illustrates the concept is illogical. Travelling back in time is conceptually flawed. Strictly speaking, the atoms that compose your body would have to return to the position they occupied in the past [not to mention the atoms that compose your 'time machine'.] Otherwise, you would violate causality - the atoms composing you and your time machine would literally be in two different places at the same time! That, at best, is a logical impossibility.
According to Einstein's theory of relativity, time is relative and can be affected by gravity and motion. This means that it is theoretically possible to travel through time, but it would require extreme conditions and advanced technology that currently do not exist.
Most theories suggest that traveling to the past is not possible, as it would create paradoxes and violate the laws of causality. However, there are some theories, such as the possibility of closed time-like curves, that propose a way to travel to the past, but they are still hypothetical and unproven.
Some proposed methods for time travel include using black holes, wormholes, or cosmic strings to manipulate space-time. These methods are highly theoretical and would require advanced technology and a deep understanding of the laws of physics.
No, time travel has not been proven to be possible. While some experiments have shown small effects on time due to gravity and motion, these are not enough to achieve time travel. Additionally, there is no scientific evidence or proof of any successful time travel experiences.
If time travel were to become possible, it would have significant implications for our understanding of the universe and the laws of physics. It could also have major consequences for our perception of causality and the potential for altering the course of history. However, until it is proven to be possible, these remain theoretical speculations.