According to the scientists, it began with The Big Bang.
There was no time before then. Now, just as we are only 3 dimensional beings and cannot experience the other dimensions, we are also unable to envision anything without time. This is similar to how we are unable to envisage a 4th physical dimension like length, width, or height. Due to its inability to comprehend the concepts of additional dimensions or a timeless space, our brain simply does not let it. In actuality, time is the fourth dimension that humans can see in addition to the three physical dimensions, and our brains can only make sense of these three dimensions.
We are the living things that change with time. We need time to complete tasks, we need time to think, everything around us moves slowly through space (the fastest speed imaginable is the speed of light), everything is constantly changing, and getting from one place to another takes time. We require space to be. be; to be. Similar to how humans need at least three physical dimensions to exist.
We are unable to perceive any greater dimension since this is how our minds are hardwired. Thus, it is impossible for us to just envision a moment without time. era that before the Big Bang And t = 0 was indeed reached at the time of the great bang.
Now coming to the why of the question. Why did the time start?
Scientists believe that everything that is there in our universe, as we see it now, including the space and time, came from the big bang and there was absolutely nothing before that.
Simply said, the matter that emerged from the big bang required time to develop. However, not everything needs time to exist, and there is the catch. But despite all the other things that take time, they may still exist. Why do they do this? using a speed equal to the speed of light. At the speed of light, time actually comes to an end. The photon that is traveling from the sun takes 8 minutes to reach the earth, yet for that photon, time hasn't passed. The journey to Earth was quick. A photon doesn't experience time, hence it has no time to perform anything throughout its lifetime. It does not change. The photon, which has a spin when it is released and has those same qualities until it is absorbed by something, does not develop like other particles do. It doesn't undergo changes like those experienced by other particles that do not move at the speed of light. It is also massless. Another possibility is that time is just an experience shared by particles and things with mass, such as ourselves. Therefore, it may be claimed that time was essential for the creation of objects with mass after the big bang.
Time started so that these things could exist.
Our understanding of time remains constant. The phenomena of time dilation necessitates a second witness. You wouldn't notice a difference in time even if you were under a strong gravitational pull. However, if someone is viewing you from a location where gravity is not as strong, they will see you acting slowly. more slowly than normal. And you'll see that he moves more quickly than normal. Your own time will be the only thing you find routine. Their own time would always be the normal regardless of how strongly or weakly gravitational pull they are under.
I hope this helps.
Thanks,
Eddie