There is an ongoing PBS TV series (also several books and also a website) called “Closer To Truth”. It is hosted by neuroscientist Robert Lawrence Kuhn. He’s included in individually interviews and panel discussions with the cream of the cream of today’s cosmologists, physicists, philosophers, theologians, psychologists, etc. on all the Big Questions surrounding a trilogy of broad subjects – Cosmos; Consciousness; God. The trilogy jointly handled truth, area and time, mind and awareness, aliens, theology and on and on and on. Here are a few of my talk about among the basic subjects covered – Is time travel possible?
# Is time travel possible? Actually I personally do not think time exists. Change exists, and time is simply our measurement of rate of change. IMHO time is just a principle. Time is a mental construct that helps us come to terms with change. Some cosmologists say that time was developed at the Big Bang, as if time were a thing with substance and structure, however I challenge them to really produce a long time in front of their peers or perhaps a TV audience or at least produce a theoretical equation or 2 that would develop time. In the meantime, here’s a trilogy of points.
First, the principle of time travel is one of those enjoyable parts of physics. Whether real or not, it is amusing to play the ‘what if’ game. If nothing else, the idea makes or forces one to think of the nature of reality.
Second of all, Einstein and others have actually postulated that time travel is a theoretical truth and I’m not in their sort of league that I can dispute the theories. I’ll leave that to others who understand the field inside and out.
However third, and most notably, you can never actually be in the future or the past, just in the future or the past compared with where when you are now. To puts it simply, no matter how you slice and dice things, you exist in the where-ever and in the whenever because where-ever’s or whenever’s NOW or in other words in today. You can not actually be in any future or in any past since you only experience the NOW which is the present. If you need to somehow take a trip back one hour, you would still experience things as belonging to NOW. If you sleep for one hour then get up, you remain in the future relative to when you fallinged asleep, but you still find yourself in the NOW.
# Is time travel possible? The answer is both yes and no. Yes, we can travel into the future at one second per 2nd, we do that anyhow whether we like it or not. Yes we can travel into the future at a slightly quicker rate by falling asleep or otherwise having our sense of awareness, our awareness of rate of modification (which is what time truly is or measures) immobilized. You get drunk and lose consciousness and the next thing you know you are 12 hours into the future. Yes we can take a trip into the future as outlined by Einstein’s twin ‘paradox’ where one twin journeys at a really high rate of speed outside bound, stops and returns to home, while the remain at house twin, well, stays at home. Upon their reunion the travelling twin discovers their remain at home twin to be far older, so the travelling twin has actually taken a trip into the future more quickly than would otherwise have actually been the case. Yes, you can take a trip back in time, in theory, inning accordance with the apparent theoretical homes that wormholes or great voids can have. No, you can’t travel to the past because of all those nasty paradoxes. I like the variation on the grandpa paradox whereby you travel back just one hour into the past and shoot yourself dead. That’s a novel method of committing suicide! The other paradox I like is when you return in time to have Shakespeare sign your copy of “Hamlet”. Shakespeare isn’t really house but the house maid promises to have him autograph your book when he returns. Alas, your timing is somewhat off and Shakespeare hasn’t yet written “Hamlet”, so when he gets your copy from his maid to sign, he reads it, and after you go back to Shakespeare’s house and get back your now autographed copy and return home to your very own time, Shakespeare now composes “Hamlet”. The paradox is, where did “Hamlet” originated from since Shakespeare just composed it after he had actually already seen your copy. No, you cannot travel back to the past since if that were possible there would be stockpiles of time-travelling tourists who returned in time to witness some important historic event or other. No stockpiles of photo-snapping tourists have actually ever been recorded existing at Custer’s Last Stand, the Battle of the Alamo, the sinking of RMS Titanic, or any one of thousands of similar historical events. Yes, you can take a trip back in time however only into a parallel universe. If you shoot yourself however it is another you in another universe, no paradox occurs. You travel back in time to have Shakespeare sign your copy of “Hamlet” but in that parallel universe Shakespeare can now compose “Hamlet” based on your copy and no paradox results. However, the one point I discover interesting is that if you wind up in the future, or in the past, are you actually in the future or the past? No, the only time you can exist in is today, your right here and NOW time. It might be a various time from what you formerly knew, however still any place and whenever you exist, you just exist in the NOW.
# Is time take a trip possible? It could already be the case that time travel has been documented at the quantum level although that could be open up to interpretation. Prior to I get to the specifics, I simply need to point out that with respect to the laws, principles and relationships of physics, time is invariant. Operations in physics stay invariant in time whether time is moving as we typically perceive it (past to future) or back to front (future to past). For instance, gravity would run as per its regular grab-ity self in a world where time streamed backwards. There’s lots of an operation one might film that when the movie were run in reverse, one would not be any the smarter. Tree branches blowing in the wind enters your mind, or the coming together, accident, and rebounding or separation of 2 billiard balls. Okay, having actually established that when it concerns physics, physics doesn’t care which direction time is streaming, there will be no offenses in those laws, principles and relationships of physics future to past, we now come to the delayed double slit experiment.
In the typical double slit experiment, you have an electron weapon that fires one electron particle at a time, such that a person electron finishes its journey before the next one is viagens, at two side-by-side slits. If one or the other slit is open, the one-at-a-time electrons go through the open slit to a detector screen behind the slits. The detector screen gets hit in nearly the same spot whenever after each and every electron particle goes through the single open slit. That is straight forward. If both slits are open, the electron shape-shifts into a wave (how I have no idea), travels through both slits (as only a wave can), morphs back into a particle and hits the detector screen. The difference is that after adequate electrons have actually been fired, and have passed or waved through the double slits, the hits on the detector screen are not in just one or two spots however all-over-the-map, albeit all-over-the-map in a timeless wave interference pattern. Okay, that’s the timeless experiment.