Is Time Dilation the Key to Understanding Time Travel in Science Fiction?

  • Thread starter Thread starter lyncsta
  • Start date Start date
lyncsta
Messages
9
Reaction score
0
Hey I just found a wiki post about time dilation and I was wondering if its correct


Science fiction implications
Scientist and science fiction enthusiast alike, quickly realized that the effects of time dilation make time travel a plausible notion. People typically thought time was linear, and equally relevant to each observer. The pre-general relativity view was that time travel would involve changing one's position on a supposed linear time-line. It has since been established that time and space exist as one, hence spacetime. In theory, if you build a mechanism that moves at a great speed with an observer inside, time will pass the observer slower than it does to those who are Earth bound. Backwards "time travel" is also theoretically possible If you exceed the speed of light. Though, to even reach the speed of light one must have 0 mass.
 
Physics news on Phys.org
The bit about 'forward' time travel while moving close to the speed of light relative to others is correct (and a confirmed concept in physics). The bit about backwards time travel is speculative at best.
 

Thread 'A sufficient condition for integrability of equation ##\nabla g=0##'

In Philippe G. Ciarlet's book 'An introduction to differential geometry', He gives the integrability conditions of the differential equations like this: $$ \partial_{i} F_{lj}=L^p_{ij} F_{lp},\,\,\,F_{ij}(x_0)=F^0_{ij}. $$ The integrability conditions for the existence of a global solution ##F_{lj}## is: $$ R^i_{jkl}\equiv\partial_k L^i_{jl}-\partial_l L^i_{jk}+L^h_{jl} L^i_{hk}-L^h_{jk} L^i_{hl}=0 $$ Then from the equation: $$\nabla_b e_a= \Gamma^c_{ab} e_c$$ Using cartesian basis ## e_I...
View full post »

Thread 'Hawking After 54 Years Confirmed: BH surfaces don't shrink'

Abstract The gravitational-wave signal GW250114 was observed by the two LIGO detectors with a network matched-filter signal-to-noise ratio of 80. The signal was emitted by the coalescence of two black holes with near-equal masses ## m_1=33.6_{-0.8}^{+1.2} M_{⊙} ## and ## m_2=32.2_{-1. 3}^{+0.8} M_{⊙}##, and small spins ##\chi_{1,2}\leq 0.26 ## (90% credibility) and negligible eccentricity ##e⁢\leq 0.03.## Postmerger data excluding the peak region are consistent with the dominant quadrupolar...
View full post »
Thread 'Dirac's integral for the energy-momentum of the gravitational field'

Thread 'Dirac's integral for the energy-momentum of the gravitational field'

See Dirac's brief treatment of the energy-momentum pseudo-tensor in the attached picture. Dirac is presumably integrating eq. (31.2) over the 4D "hypercylinder" defined by ##T_1 \le x^0 \le T_2## and ##\mathbf{|x|} \le R##, where ##R## is sufficiently large to include all the matter-energy fields in the system. Then \begin{align} 0 &= \int_V \left[ ({t_\mu}^\nu + T_\mu^\nu)\sqrt{-g}\, \right]_{,\nu} d^4 x = \int_{\partial V} ({t_\mu}^\nu + T_\mu^\nu)\sqrt{-g} \, dS_\nu \nonumber\\ &= \left(...
View full post »

Similar threads

I Another Time Dilation Question
Replies
23
Views
3K
I Can someone falsify this analogy contradicting time dilation?
Replies
25
Views
2K
I What causes time dilation and length contraction
Replies
10
Views
2K
B Trying to understand what "time" is (layperson)
Replies
21
Views
2K
I A question about Relativity of Time using Time dilation experiment
Replies
12
Views
2K
B Faster than speed of light due to time dilation?
Replies
27
Views
4K
B Time Dilation: How Does Speed Affect Aging?
Replies
10
Views
6K
I Kinetic vs Gravitational Time Dilation: Perceived Speed
Replies
5
Views
2K
B Would We See the Same Light After Traveling Back to Earth Faster Than Light?
Replies
2
Views
2K
I Confused about time dilation -- motion vs energy
Replies
9
Views
293

Hot Threads

Recent Insights

Back
Top