Closer To Truth: Is Time Travel Possible?
There is an ongoing PBS TV collection (additionally numerous books and a website) known as “Closer To Truth.” It is hosted by way of neuroscientist Robert Lawrence Kuhn. He’s featured in single-on-one interviews and panel discussions with the cream of the latest cosmologists, physicists, philosophers, theologians, psychologists, and so forth, on all of the Big Questions surrounding a trilogy of large topics – Cosmos, Consciousness; God. The trilogy collectively treated reality, space and time, mind and focus, extraterrestrial beings, theology, and on and on. Here are a few of my comments on certainly one of the overall subjects protected – Is time travel feasible?
# Is time journey viable? Actually, I, in my view, don’t consider time exists. Change exists, and time is just our measurement of the charge of change. IMHO time is only an idea. Time is a mental construct that enables us to come to phrases with the exchange. Some cosmologists say that time turned into created on the Big Bang as if time were a thing with substance and shape. Still, I project them to, without a doubt, create some time in front of their friends or perhaps a TV target market or at the least produce a theoretical equation, or that would create time. In the interim, here is a trilogy of points.
First, the idea of a time tour is one of these laugh components of physics. Whether true or now not, it’s far interesting to play the ‘what if’ game. If not anything else, the concept makes or forces one to reflect onconsideration on the character of fact.
Secondly, Einstein and others have postulated that point travel is a theoretical truth, and I’m now not of their form of the league that I can dispute the theories. I’ll go away that to others who recognize the field interior and out.
But thirdly, and most importantly, you may never certainly be the destiny or the past, only within the destiny or the past compared to in which and while you at the moment are. In other phrases, no matter how you slice and dice matters, you exist within the wherein-ever and inside every time in that wherein-ever’s or whenever’s NOW or in different phrases inside the gift. You can not literally be in any future or any past because you best experience the NOW, which is the present. If you should go in some way tour back one hour, you will still experience things belonging to NOW. If you sleep for one hour then wake up, you are in the future relative to when you went to sleep, but you still discover yourself inside the NOW.
# Is time travel feasible? The solution is each sure and no. Yes, we can journey into the destiny at one 2nd in step with 2d; we try this anyway whether we adore it or now not. Yes, we can journey into the future at a barely faster charge with the aid of going to sleep or otherwise having our sense of recognition, our attention of charge of alternate (that’s what time surely is or measures) incapacitated. You get under the influence of alcohol and skip out, and the subsequent thing you know, you are 12 hours into the destiny. Yes, we will journey into the destiny as outlined by way of Einstein’s twin ‘paradox’ where one twin travels at a very excessive fee of velocity outward certain, stops and returns to domestic base, at the same time as the stay at the domestic twin, properly, remains home. Upon their reunion, the journeying twin unearths their stay at domestic dual to be ways older, so the traveling twin has traveled into the destiny extra rapidly than might otherwise have been the case.
Yes, you can tour returned in time, in principle, in keeping with the obvious theoretical homes that wormholes or black holes could have. No, you can’t journey to the beyond due to all of these nasty paradoxes. I like the version of the grandfather paradox wherein your journey returned simply one hour into the past and shoot yourself self-useless. That’s a singular manner of committing suicide! I like the different paradox while you go back in time to have Shakespeare autograph your copy of “Hamlet.” Shakespeare is not domestic, but the maid promises to have him autograph your ebook while he returns. Alas, your timing is barely off, and Shakespeare hasn’t but written “Hamlet.” Hence, whilst he receives your reproduction from his maid to autograph, he reads it, and after you come to Shakespeare’s domestic and acquire lower back your now autographed replica and return home on your own time, Shakespeare now writes “Hamlet.”
The paradox is, wherein did “Hamlet” come from because Shakespeare simplest wrote it after he had already seen your copy. No, you can’t tour lower back to the beyond due to the fact if that were viable, there would be hoards of time-touring vacationers who went again in time to witness some critical ancient occasion or different. No hoards of image-snapping tourists have ever been documented being present at Custer’s Last Stand, the Battle of the Alamo, the RMS Titanic sinking, or someone of hundreds of comparable ancient events. Yes, you can journey back in time; however, it best right into a parallel universe. However, if you shoot yourself, it is another you in every other universe; no paradox arises.
Your journey returned in time to have Shakespeare autograph your replica of “Hamlet.” Still, in that parallel universe, Shakespeare can now write “Hamlet” primarily based on your copy and no paradox effects. However, the only factor I locate exciting is that if you end up in the future, or inside the beyond, are you sincerely inside the destiny or the beyond? No, the most effective time you could exist in the present, proper right here and NOW time. It is probably an exceptional time from what you formerly knew, but still, wherever, and on every occasion, you exist, you best exist inside the NOW.
# Is time travel viable? It should already be the case that point journey has been documented at the quantum degree, although that might be open to interpretation. Before I get to the specifics, I need to factor out that time is invariant concerning the laws, ideas, and physics relationships. Operations in physics stay invariant in time whether or not time is transferring as we generally understand it (past to destiny) or lower back to front (destiny to beyond). For example, gravity would perform as in line with its normal seize-city self in an international wherein time flowed backward. There’s many an operation one should film that once the film has been run backward, one wouldn’t be any the wiser. Tree branches blowing in the wind involve thoughts, the approaching together, collision, and rebounding or separation of two billiard balls. Okay, having set up that on the subject of physics, physics does not care which path time is flowing, there could be no violations in the one’s legal guidelines, concepts and relationships of physics destiny to beyond, we now come to the delayed double slit experiment.
In the everyday double-slit test, you have an electron gun that fires one electron particle at a time, such that one electron completes its journey earlier than the next one is fired, at two aspect-by means of-side slits. If one or the other slit is open, the only-at-a-time electrons pass thru the open slit to a detector screen in the back of the slits. The detector screen gets hit in nearly the same spot on every occasion, and every electron particle passes through the unmarried open slit. That is uncomplicated. If each slot is open, the electron shape-shifts right into a wave (how I do not know), passes via each slit (as simplest a wave can), morphs back into a particle, and hits the detector display screen. The distinction is that once sufficient electrons were fired and have handed or waved thru the double slits, the detector display’s hits are not in just one or spot but all-over-the-map, albeit all-over-the-map in a conventional wave interference sample. Okay, that is the conventional experiment.
Now we do a version of the topic, the behind schedule double-slit experiment. Electrons are fired one-at-a-time, with both slits wide open. An all-over-the-map conventional wave interference pattern ought to appear at the regular detector display after sufficient electrons were fired. However, further to the normal detection display, other detectors are placed behind the ordinary detector display, which can be every in an actual line-of-sight with each of the two slits. The electron is fired. It morphs right into a wave and passes through both slits, then morphs back right into a particle. But before the electron, which has already been handed thru each slit, can hit the detector display, the detector display screen is removed to reveal at the back of it the alternative line-of-sight detectors.
Now possibly once the electron has passed through the double slits, it is too little too overdue to change its mind about wherein it’ll hit. Only a tiny few need to be detected via the two line-of-sight detectors aligned with the 2 slits. Alas, each electron may be detected through one of the alternatives of road-of-sight detectors. It would appear that the electron CAN trade its thoughts after it has already long gone via each slit and alternately appear to have long past thru one or the alternative of the 2 slits. After surpassing each slit, one interpretation is that the electron realized the gig was up, traveled, returned in time, retraced its course, and handed via one or the other slit.