# Why Time? “Dilates”?

Time “dilation” has been most probably the best-known connected with the relativity benefits because of the twin paradox. The following the scenario: An astronaut leaves on a space rocket going at nearly the speed of light. Shortly after whizzing around the galaxy she comes back to find that her (non-identical) twin brother in the world is actually an elderly adult male with a lengthy beard whilst she herself is literally young. Today this is actually mind-boggling. Why must time pass even more slowly just due to the fact that you are actually moving? Precisely what physical explanation will we identify when it comes to that?

Intuitive explanation. The explanation is once again founded on the field character of matter, described by the field equations. Consider a pair of atoms in a rocket ship (or in its contents). Suppose that one atom produces a field disturbance and also the second that intrusion reaches the second atom something occurs. (It is the interaction among atoms, it goes without saying, that triggers everything to happen.) Presently if the transport is moving, the next atom is going to have gone further ahead, thus the disturbance must travel a greater distance to get there, even after taking the F-L contraction into account. Considering that fields travel at a set rate, it is going to subsequently take longer for the disruption that one may reach the second atom. (Disturbances that propagate in the backward direction have a shorter distance to travel, but this effect turns out to be not as great.) Simply put, things happen more slowly when you’re moving because the fields have to travel a greater distance.

An analogy. Consider two men on a raft who exchange information by calling back and forth to each other. Suppose further that this exchange of information determines the evolution of events on the raft. That is, when B receives information from A he makes certain things happen, and when B calls back to A, other things happen. The problem is, it takes time for the sound waves to travel from A to B and by the time the sound reaches B, he will have moved to a new position B’. Therefore the sound must travel through a greater distance and the communication will take longer than if the raft were at rest.

http://www.quantum-field-theory.net/time-dilates