Time Travel Essay

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The act of time travel assumes that we can travel time at a rate different when compared to the normal world. There are several theories on how one could travel through time physically even if the methods wouldn’t make a lot of sense logically. These methods range from altered movement in regular space to the abuse of certain cosmic phenomena which may or may not exist. In this paper I will argue that the physical possibility of time travel is sound and therefore possible even if only theoretically. To begin with this paper, I want to first define time travel, and this will be done using a modification of David Lewis’ definition. In his definition Lewis defines time travel as a discrepancy between the time traveler’s personal time compared …show more content…

The first way is that you accelerate away from a location that we will refer to as “at rest”, by accelerating back towards them you have effectively “skipped” a portion of time. This is due to spacetime being in balance so having such a large displacement of space means that time must move slower to balance that. Since the amount of time that has passed for you is less than the amount that passed for the location “at rest”. That now matches our definition for time travel and as such you have now traveled to the future. The second way that time dilation can occur is through being inside a strong gravitational, it has been observed that the passage of time in a strong field when observed by someone in a weaker field would be slower relative to the observer in the weak gravity field. This, by our definition of time travel, is an example of peering into the past or by entering that field entering the relative past.
Now that I have explained why the physics of time travel is sound we can move on to how to simulate those phenomena purposely to take advantage of time dilation as a means of time travel. In the case of time dilation due to differing velocity the most basic way to simulate this is to travel at very high speeds, for the sake of our discussion we will assume we have a spacecraft that can move at speeds akin to lightspeed or close to it. By accelerating at that speed then returning to the location “at rest” we have achieved time travel to the future. Alternatively, we can use the phenomenon known as

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