Pretzel · 70-79, M
if it was then it would have happened already
that's what I told you 6 months from now too
that's what I told you 6 months from now too
DealingWithTrouble · 41-45, M
ProfessorPlum77 · 70-79, MVIP
@DealingWithTrouble Very deep diagram.
🤔
🤔
DealingWithTrouble · 41-45, M
@ProfessorPlum77 https://en.m.wikipedia.org/wiki/Penrose_diagram
newjaninev2 · 56-60, F
Pick a star 50 light-years away.
Travel to that star at 99% of the speed of light
Return to Earth at 99% of the speed of light
The entire journey will have taken you 7 years i.e. you will be seven years older.
On Earth, 50 years will have passed.
Everything and everyone will be 50 years older. Your friends and family will have aged normally (most of them will be dead).
As far as everyone on Earth is concerned, you have been gone for 50 years (remember to make some really good investments before you go).
Discuss. 😀
On the other hand, travel to the past can't ever happen.
The Law of Causality forbids it... no loopholes and no free passes.
Discuss. 😀
Travel to that star at 99% of the speed of light
Return to Earth at 99% of the speed of light
The entire journey will have taken you 7 years i.e. you will be seven years older.
On Earth, 50 years will have passed.
Everything and everyone will be 50 years older. Your friends and family will have aged normally (most of them will be dead).
As far as everyone on Earth is concerned, you have been gone for 50 years (remember to make some really good investments before you go).
Discuss. 😀
On the other hand, travel to the past can't ever happen.
The Law of Causality forbids it... no loopholes and no free passes.
Discuss. 😀
View 2 more replies »
ProfessorPlum77 · 70-79, MVIP
@newjaninev2 🤔
newjaninev2 · 56-60, F
@ProfessorPlum77 It's invalid to talk about 'time' as if it were something that exists independently as a standalone phenomenon.
There's only spacetime... And that's when things become interesting 😀
There's only spacetime... And that's when things become interesting 😀
ProfessorPlum77 · 70-79, MVIP
@newjaninev2 Too deep for me!
twiigss · M
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ProfessorPlum77 · 70-79, MVIP
@jshm2 🤔
ProfessorPlum77 · 70-79, MVIP
@AnnaBunny 🤔
Entwistle · 56-60, M
Not in the way movies and sci fi books describe.
ProfessorPlum77 · 70-79, MVIP
@Entwistle Thank you.
4meAndyou · F
https://www.ibtimes.co.uk/physicists-prove-time-travel-possible-by-sending-particles-light-into-past-1453839
4meAndyou · F
@Musicman ""Einstein's theory describes the world at the very large scale of stars and galaxies, while quantum mechanics is an excellent description of the world at the very small scale of atoms and molecules."
Simulating time travel
The scientists simulated the behaviour of two photons interacting with each other in two different cases.
In the first case, one photon passed through a wormhole and then interacted with its older self.
In the second case, when a photon travels through normal space-time and interacts with another photon trapped inside a closed timeline curve forever.
"The properties of quantum particles are 'fuzzy' or uncertain to start with, so this gives them enough wiggle room to avoid inconsistent time travel situations," said co-author Professor Timothy Ralph.
"Our study provides insights into where and how nature might behave differently from what our theories predict."
Although it has been possible to simulate time travel with tiny quantum particles, the same might not be possible for larger particles or atoms, which are groups of particles."
https://www.ibtimes.co.uk/physicists-prove-time-travel-possible-by-sending-particles-light-into-past-1453839
Simulating time travel
The scientists simulated the behaviour of two photons interacting with each other in two different cases.
In the first case, one photon passed through a wormhole and then interacted with its older self.
In the second case, when a photon travels through normal space-time and interacts with another photon trapped inside a closed timeline curve forever.
"The properties of quantum particles are 'fuzzy' or uncertain to start with, so this gives them enough wiggle room to avoid inconsistent time travel situations," said co-author Professor Timothy Ralph.
"Our study provides insights into where and how nature might behave differently from what our theories predict."
Although it has been possible to simulate time travel with tiny quantum particles, the same might not be possible for larger particles or atoms, which are groups of particles."
https://www.ibtimes.co.uk/physicists-prove-time-travel-possible-by-sending-particles-light-into-past-1453839