Jump to content

Has time travel been discovered/harnessed yet?


MegaDestructor

Recommended Posts

Time travel to the past would mean there are two or more the same particles existing simultaneously..

e.g. you imaginary travel to past 1h, and there are two copies of you and you+1h..

Particle is in two places at the same 'time'..

 

 

Edited by Sensei
Link to comment
Share on other sites

It's out of fashion these days, but I'm not aware of any reason that an antiparticle can't be interpreted as a particle travelling backwards in time as in e.g. Feynman diagrams.

The 'same' particle exists in two places at the same time.

 

Link to comment
Share on other sites

On 08/01/2018 at 2:56 PM, Sensei said:

Time travel to the past would mean there are two or more the same particles existing simultaneously..

e.g. you imaginary travel to past 1h, and there are two copies of you and you+1h..

Particle is in two places at the same 'time'..

It wouldn't be the past, either. Right now, there is just me in this room. If I step into  a time machine in an hours time and go back an hour, there will be two of us. That's obviously not THE past. It's something that looks similar but is different.

Even if I replaced the version of me that was there an hour ago, it's still not the past. It's similar, but my brain and body is an hour older. I might have had a pee or poo, or a meal, so my weight wouldn't be the same. So the act of going into the past means it's NOT the past. 

I would say that it's not theoretically impossible to observe the past. That's what we do when we look through a telescope. Maybe it would be possible one day to look at reflections of the past on Earth, bouncing off far away bodies. Highly unlikely though. There's more chance of us being sent pictures or video of our past by aliens on far away planets. No sign of it yet though. :(

Link to comment
Share on other sites

7 hours ago, mistermack said:

It wouldn't be the past, either. Right now, there is just me in this room. If I step into  a time machine in an hours time and go back an hour, there will be two of us. That's obviously not THE past. It's something that looks similar but is different.

Even if I replaced the version of me that was there an hour ago, it's still not the past. It's similar, but my brain and body is an hour older. I might have had a pee or poo, or a meal, so my weight wouldn't be the same. So the act of going into the past means it's NOT the past.

Might be able to meet yourself, then go on to become the future self you meet.

I suspect Universe doesn't really allow time travel backwards though.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.