The Science Behind TENET Explained | Time Travel, Block Universe Theory And Entropy. We break down how time and entropy works in Tenet.

#Tenet #ChristopherNolan #Time

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Ok so TENET is a pretty mindbending movie that deals with the complexities of entropy, theoretical physics and the flow of time. Throughout this video we're gonna be going through the ins and outs of the science behind the film and giving our thoughts on how it all works.

There will be some spoilers here so if you haven't had the time to check out the movie yet then I highly recommend that you turn off now. Make sure you drop a thumbs up if you enjoy the video and please subscribe to the channel for videos like this every day.

With that out the way, this is the heavy spoilers show, I'm your host Paul, now let's get into the science behind Tenet.

Time Travel Explained

Ok so Tenet subscribes to the theory that there exists only one timeline and that if one were to travel back to the past, they would not be able to alter things and instead would simply end up playing into the events that happened so that the future could follow the same course.

This means that time is not malleable and everything that will happen will happen exactly how it's supposed to.

In theoretical physics there actually exists a manner of thinking known as the block universe theory which states that all of time is actually happening at once and we merely give it the notion of past, present and future because of our inability to comprehend it's vastness.

It's something that fiction has toyed with, most notably Doctor Manhattan who was able to see every moment in his life simulataneously but the depths of it go far beyond comic book characters.

Now time is very difficult to explain and I'll try my best to go over the block universe theory with diagrams and relatable things so do bear with me.

Before going into everything though we have to discuss what spacetime is.

Now spacetime is the measurement of the three dimensions of space fused as well as time which creates a four dimensional manifold that can be carried across into co-ordinates.

I'm going to be predominantly using this image of a grid in order to map out what exactly space time is and how these building blocks of it all fall in line to create a precise measurement that we can understand.

Now I'm going to label this your day, I'm not spying on you don't worry, but once you get to grips with this model it should hopefully get your head around the entire thing.

Ok so imagine this is actually your day mapped out in the form of a cube.

At 8:00 am you wake up, so we would mark this down as a time on the cube and because we know the location of your home...because I am spying on you...we can mark down the exact co-ordinates of this giving us a precise moment of spacetime once we also factor in todays date.

Now imagine each one of these cubes within the cube is a point in your day.

Because we have the location we and time that you are at said location, we can map out precise co-ordinates.

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