Time Travel

[BerkshireBlue]

Most of us on here are time travellers. If you've ever been on a plane then you've already experience time dilation via the Hafele-Keating experiment learnings on special relativity.

 

[Dave Ewing's Back 'eader]

All you need is a TARDIS. There was a TV series about it.

But that was a BBC programme. Don't believe a word those bastards come out with.

 

[BimboBob]

I think if you buy one of the cars that were made in Northern Ireland with tax payers money, find a friendly but slightly weird but not in a paedo way professor, get a small and slightly shaking man who thinks he can act but in reality all he does is run around like an ex-leper and then invent some y shaped light box then time travel is possible.

 

[Damocles]

"Backwards time travel is theoretically possible by several different methods using general relativity. However, each of these methods has its own peculiar problems that could destroy the time machine before it has a chance to operate.

If I am allowed to build something that cannot exist then I too can violate the laws of physics.

"There's nothing in Einstein's theory that precludes time travel into the past."
- http://science.howstuffworks.com/science-vs-myth/everyday-myths/time-travel2.htm

Literally, you missed the rest of the sentence:

There's nothing in Einstein's theory that precludes time travel into the past, but the very premise of pushing a button and going back to yesterday violates the law of causality, or cause and effect.

More accurately than the previous post, the calculations in general relativity that this article is talking about are essentially loopholes that are closed by our understanding of the quantum world. You could argue that general relativity, if you literally ignore every other piece of physics, would allow backwards time travel potentially but it doesn't live in an isolated frame. This is like suggesting that you could potentially walk across the Atlantic Ocean because ice exists; whilst this is true the Sun also exists as does the wind and a million other objects.

Michio Kaku is possibly the least respected science communicator on the entire planet and consistently tells people sci-fi.

https://www.quora.com/What-do-physicists-think-of-Michio-Kaku

Well, as many of us have seen, Michio Kaku went on the CBS Morning Show to talk about the Higgs boson. He was energetic and enthusiastic and spoke with a lot of charisma. The one problem was that everything that he said during the entire interview was factually wrong.

Michio Kaku was speaking about another hypothetical particle, called the Inflaton. The Higgs and the Inflaton are almost certainly in no way related to each other. It is nearly impossible to make them even distant cousins in speculative theories. What he said about the Inflaton was more or less true, other than to imply that the LHC will have anything to say about it (it won't).

http://scienceblogs.com/principles/2013/03/19/against-kaku-ism/

Kaku is called by different media organizations to talk about such a wide range of topics that, while he consistently says wrong things about whatever he’s talking about at that particular moment, he’s usually only pissing off one subfield at a time, and the rest of science happily ignores him.

 

[crazyg]

It is possible, ive done it. When i flew from Manchester to New York my flight was at 1pm, the flight was around 7 hours but i landed in New York at 3pm.... Fucking Spooky. When i tell people they either laugh at me or call me a stupid ****, but i know it happened.

If you'd flown there on Concorde, you'd have arrived before you set off.

 

[crazyg]

I could have sworn I read this thread 3 weeks ago, or was it 3 weeks from now?

 

[marco]

was this not proved with the nuclear clock one traveling east and one west, there was a time difference on each direction certainly proving this can be achieved all be it one second is nothing but yet it can be done and what about the leaving earth at the speed of light theory to point A then returning back to find your children have passed away through old age while you have only aged the time of the trip

 

[west didsblue]

If I am allowed to build something that cannot exist then I too can violate the laws of physics.


Literally, you missed the rest of the sentence:

There's nothing in Einstein's theory that precludes time travel into the past, but the very premise of pushing a button and going back to yesterday violates the law of causality, or cause and effect.

More accurately than the previous post, the calculations in general relativity that this article is talking about are essentially loopholes that are closed by our understanding of the quantum world. You could argue that general relativity, if you literally ignore every other piece of physics, would allow backwards time travel potentially but it doesn't live in an isolated frame. This is like suggesting that you could potentially walk across the Atlantic Ocean because ice exists; whilst this is true the Sun also exists as does the wind and a million other objects.




Michio Kaku is possibly the least respected science communicator on the entire planet and consistently tells people sci-fi.

https://www.quora.com/What-do-physicists-think-of-Michio-Kaku



http://scienceblogs.com/principles/2013/03/19/against-kaku-ism/

But apart from all that, you can still go back in time in a Tardis or in a DeLorean can't you?

In fact, didn't HG Wells write a non-fiction book in the 19th century where he invented a time machine?

 

[MCFCTrick]

Well there is a group of twats who would love to take Europe back to medieval times ....

 

[Jim Tolmie's Underpants]

"Backwards time travel is theoretically possible by several different methods using general relativity. However, each of these methods has its own peculiar problems that could destroy the time machine before it has a chance to operate. Perhaps we can find one time machine among the lot which holds the most promise of taking us to the past."
- Bryan J. Méndez, Ph.D., Center for Science Education, Univeristy of California, Berkeley.

If I am allowed to build something that cannot exist then I too can violate the laws of physics.

Where does he say it can't exist? He clearly states "Backwards time travel is theoretically possible by several different methods using general relativity. " If it's theoretically possible, by definition, it can't "viloate the laws of physics."

Can't be bothered trying to answer the rest of your post as I'm going for me tea!