According to our current understanding of physics, as described by Einstein's theory of relativity, time dilation occurs when an object moves at speeds approaching the speed of light. Time dilation means that time appears to pass more slowly for the moving object compared to a stationary observer.
If you were to travel back in time at near light speed, you would indeed experience time differently compared to observers in the reference frame you left behind. From your perspective, time would appear to pass more slowly compared to the time experienced by those who remained stationary.
However, it's important to note that the concept of time travel and its implications are still speculative and beyond our current technological capabilities. The idea of "changing" the past raises paradoxes such as the grandfather paradox, which questions the possibility of altering events in a way that would contradict itself or create inconsistencies.
One possible resolution to these paradoxes is the concept of a "self-consistent timeline" or the Novikov self-consistency principle, which suggests that any actions taken by a time traveler in the past would already be a part of history and would have already occurred, without causing any inconsistencies.
It's worth noting that time travel and its consequences are still theoretical and subject to ongoing scientific research. As of now, we don't have definitive answers regarding the feasibility or limitations of time travel, and it remains an area of active scientific inquiry and speculation.