Tuesday, May 9, 2017

What time is it? (Non fictional)


     usually do not like to write about topics such as the one I'm going to be trying to get across today, for the simple reason that most people don't care for it, or don't understand it. Not to mention the fact  that I, in essence, only know a fraction about it. In fact, it is not only me that doesn't completely understand it- it still confuses the greatest of the physicists to this day. But then it hit me, this was MY blog, and I could write about whatever I wanted. So if you are one of the few who are actually interested, go on and read. Again, let me stress on the fact that this is a widely debatable topic even today, and what I write, is my views on it, it may be right, or it could be wrong. I guess you could call it the laymans guide trying to explain what still confuses the best of the most professional physicists of all times.  Ironic, I know.

   We live in a 3 dimensional world, or do we? The thing is we can only really visualize the three spatial dimensions. You have one (Up,down), and another (Left,right) and another (Forwards/backwards), and in theory, knowing the three coordinates will give you the correct location of any object, or place. Right

  Wrong. But you're not completely wrong- everyone assumed we lived in a 3D space, and it was thought of like that, until Einstein came around and gave his theory of special relativity- which demonstrates how we do not merely exist in a 3D space, but rather in a 4D spacetime. Let me explain why exactly we need the fourth dimension as simply as I can- I think you all seem to understand that we need the three coordinates to describe something's spatial position but I could go to that position and the object not be there. That's because you didn't specify when (think about arranging meeting somebody at a specified place with no specified time, that'd be useless). That is the simplest sense in which time is the fourth dimension of spacetime. Have a look at this meme now, if you understand this, you've understood what I'm trying to say.

You know what else is almost as confusing as time? Yeah, you got it right, you know you did. Women, duh! Next time she gets hormonal and asks for you to leave her alone, you'll know why!

Alright, jokes aside now, let's get back to the point of this post,

Alright, so I also spoke about how we can only visualize three dimensions, and that is true- to an extent, but we can loosely see the qualitative aspect of it in the picture below.

This is the image of a plane taking off. 
(Not mine, found the image on google, I'll link it here.)
If you look at it close enough, you can tell that the plane is at a so and so distance, but something peculiar about long exposure photographs such as this- is the fact that it shows that the plane has traveled with time. Let me just mention that though it loosely helps us imagine time as the 4th dimension, it only shows three dimensions- The two spatial we spoke about above, and time.

But again, this is a highly imaginative concept, which very, and and I repeat, VERY loosely shows the visualization of time. Does not depict it, and it obviously doesn't graph it.

Whatever I mentioned up till now, was the physics related aspect of time. It wasn't my aim to get that across, but it was needed to be said, to explain what I want to put forth. 

  According to our current understanding of the universe, time began at the moment of the Big Bang.  It is not terribly meaningful to speak of before the Big Bang, as there was nothing prior to that point so concepts like time are meaningless. 

  But does time have an end? And if it does then what? Try going back to that moment (Notice how I didn't say time?) in time (Oops) and try recalling your physics formulae. Without time, it would all be incomplete. Einstein always thought of the universe to be static, and infinite. But, with the research today, it is thought to be expanding with time.

 Time had a beginning but whether it will have an end depends on the nature of the energy that causes it to expand at a rate which is ever accelerating. The rate of this expansion may eventually tear the universe apart or; alternatively the energy may decay, reversing the Big Bang and ending the Universe; or the Universe may simply expand forever.

    Now think back to how many times you've whined about you 'wasting time'. You cannot waste time. Time is not yours to waste. You do not own it, nor is it manageable. You can simply live through it. Modern physics tells us it is considerably more plastic and pliable than most people realize. We all do understand that the Earth is constantly moving, right? What we never see, is that, simply put, time moves with it, and surprisingly in the same direction, just faster. Again, we all do seem to realize that we can move to different dimensions by simply driving, or walking to the coordinates, but can we move through time? Theoretically, if we moved faster than the Earth, much faster, in fact, not only as fast as the speed of light, but faster, faster than 299 792 458 m/s, 
we could actually travel faster than time. Remember how I said they're both moving forwards, imagine moving faster.
  But, can one particle exist in two places at ONCE? Let me rephrase that. Can two particles exist in two different place at the same time? Well, simply put, yes, it can. So does that mean we can too?

  The electron in a hydrogen atom moves at a velocity of about two million meters per second. If you can move that fast -- or faster -- without vaporizing yourself, then (from the perspective of an observer who has a velocity of zero in a common reference frame) then maybe.

 But practically, it isn't. Now I'm not speaking of the physics related drawbacks to the concept, because there are many of those(How it would require an infinite amount of energy to travel backwards in time). I'm talking about logical implications that the concept of time travel which practically isn't possible.

  But wait- answer me this first- Do you think everything is mapped out? That we are living in an unchangeable world. And decisions do not exist? 

Because if you do believe that it is, in fact, changeable you can’t believe we can ever travel to the future. Because if the future is subject to change, then it is undetermined and therefore does not exist yet. But the past? That might be. Because we've already lived it, Right?

  It may, therefore, be theoretically, to travel to OUR past, but to do so we will have to learn to jump dimensions, a rather unrealistic goal. Also if, and when you do manage to time travel back to the past, wouldn't a simple action change your present? The grandfather hypothesis comes to mind- which is also the plot for many of the science fiction movies today. Simply put, it states that, if you could travel back in time, and kill your grandfather, or your father, then what? You wouldn't be born, and hence, not alive. But if you weren't, indeed, alive- they would be, and you'd be born and this just keeps on spiraling.

  There is, however, another way to see the future and the past- under known present models in the field of physics, that support time travel into the past, your action will place you into an alternative universe. This present will be unchanged, as this present only occurs on the timeline where the insect isn’t killed. The alternative present will also be unchanged, as it only occurs on the timeline where the Grandfather(Or the father) is killed. 

  Also, one last thing. For time travel to be possible, the past, present and the future must exist, Right? We've lived through the past, so that does. We are in the present now, so that definitely does, but the future? Now, unless you want to believe the aforementioned stigma, that the world is unchangeable, and everything is mapped out, the future does not exist. If you didn't understand it, read it again. Now, think about it, think about what it means. If the future exists, it means somewhere, someone must've discovered time travel? Far far into the infinite future, surely someone must've. But if that was true, we'd know, wouldn't we? We would have someone visit us from the future. And the mere fact that we haven't very strongly suggests that the future doesn't exist.  Or it could also mean that time travel isn't possible, which again is STRONGLY due to the fact that time doesn't exist, like we assumed for it to, throughout this post.

  This is a topic that has fascinated me since a long time, and I just looooove to debate about it. And if you are one of the few that actually made it this far,  I'd really like to know your views about it, in the comments below, or if you know me, you could just drop me a message on any of my social medias. 

 Another thing, I'm probably going to be releasing a lot of fiction related to time and all its implications, paradoxes and stigmas. 

Until next time, folks. Thanks for reading.