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[–] • 3 pts

I don't believe any of that shit.

[–] • 3 pts (edited )

You shouldn't. The universe doesn't care about our mathematical perception of time. There is no evidence "time" even exists. Currently, it appears time is simply a conscious perception of entropy. Additionally, if you pay attention to reference frames, it requires the consciousness of a single observer shapes the entire universe. Which is why everything is a paradox. My reality changes your reality. Your reality changes my reality. We are forever in a paradox. It's bullshit.

This ignores that we have almost zero confirmation of our simulations and mathematical modeling of the universe and big physics. We've literally never left the sphere of influence of Earth (the Moon is still in the Earth's sphere of influence). The only things which have are extremely primitive satellites which have never left (or barely so) our solar system. And even that is a complete guess. Which in turn is based on "surprises" of what they found, which they don't really understand and can't fully explain. Which in turn is wrapped with guesswork offered as fact.

We know the explanation of how the sun works is completely wrong as cause and effect is experimentally confirmed backwards. Mainstream says a nuclear event creates EMF. Which confirms fusion is its core. Except we have confirmed EMF events create nuclear events. Which confirms the sun functions on EMF, first and foremost, which in turn creates fusion. Which means the mainstream teaching of how the sun works is verifiably completely wrong. These types of confirmed lies by mainstream means our mathematical understanding of the universe is completely wrong. It's turtles all the way down.

When your foundational platforms of "understanding" are confirmed complete bullshit, anything built upon it is confirmed complete bullshit. Anyone telling you otherwise is a liar or charlatan.

[–] • 0 pt

And the very concept of time travel implies a second time dimension. If you have someone using a time machine to jump around the time line, you've just introduced a second, real time dimension in which you can talk about the order he does the time travel. Only a single time dimension makes sense, so you've basically turned the normal time into another physical dimension.

[–] • 0 pt

(the Moon is still in the Earth's sphere of influence)

Too bad we never went

[–] • 1 pt

A paradox is only cool because it's impossible. The locality violation of QM seems impossible too. Maybe the universe is built on paradoxes.

[–] • 1 pt

I lose it at 13:27. What is all this mumbo-jumbo about a shifted time line?

The basic question is what's so special about the speed of light? He's saying he proves that FTL isn't possible via these diagrams, because it causes paradoxes. But he doesn't explain why light's speed is so special.

[–] [deleted] • 1 pt

Daniel and Jorge Explain the Universe does a good podcast on the speed of light and the fact that it is arbitrary. Why is 299,792,458 the speed limit? We have no idea. Experiments with atomic clocks in airplanes do show that time slows down in the plane as it travels faster relative to one on the ground .. and you add in space observations and it does appear that the time slowdown is asymptotic to the speed of light.

The shifted time line isn't well explained since he's using a 2D model to try to explain it in 3D. Keep in mind, on Earth, we're currently traveling several thousand km/s. We don't feel it because this is a very large planet, with a lot of gravity, keeping as on it as it hurls through space. It's not that Earth is straight up and down on its world line ... it's straight up and down relative to the ship. For the ship, their world line is straight up and down (they should have animated a transition between the two I think).

[–] • 1 pt

The intuitive model I've seen used is that everything is always moving at constant velocity, divided up among the three spatial dimensions and the time dimension. So if you're moving very fast in space, you're not moving in time very fast. This nicely covers the way someone on a very fast space ship going for a short journey and back to Earth would find everyone very aged.

[–] [deleted] • 1 pt

Yes, that's a good way to visualize it. I don't think the video's representation violates that model though.

But back to your original question "why light's speed is so special." That person on that very fast space ship going on a short trip; they would move slower through time (and faster through space) than everyone on Earth. An observer on Earth might watch them take over 100 years to make that short journey, but only a year might pass for the person on the ship. That difference between the two grows asymptotically as you approach the speed of light.

General relatively says as you get closer and closer to c, and you had infinite fuel, that difference would grow to the point where the relative time changes across the length of the ship would grow so great that final drop of fuel needed to reach c would never make it into the fuel tank.

[–] • 0 pt

Read a fun book on that as a kid

Faster Than Light: Superluminal Loopholes in Physics - Nick Herbert, 1989 https://www.goodreads.com/en/book/show/116172

[–] • 0 pt

You can't run that fast, how do you know? :P

[–] • 2 pts

Maths and theories.

[–] • 2 pts

i told you he was a witch!

[–] • 1 pt

People like you would think that

[–] • 1 pt

But that's the problem. We have huge theories and models based upon nothing but guesses which are frequently confirmed wrong. For example, the big bang, dark energy, and dark matter are all just theories built upon mathematical models which are completely unconfirmed. They then create experiments to confirm these models which ignoring all experiments which confirm them invalid.

We really don't know very much about the universe. For example, the expanding universe theory can also be explained by plasma. Black holes can also be explained by plasma. A plasma universe doesn't require dark energy/matter. So on and so on.

This is what most astrophysicist metaphorically actually do: https://www.boredpanda.com/medieval-animal-paintings-that-dont-look-real-daniel-holland/

[–] • 0 pt

the expanding universe theory can also be explained by plasma.

It doesn't have to.

The Doppler Effect explains and proves it.

[–] • 0 pt (edited )

We've already broken the FTL barrier in . We've also witnessed energy escaping from black holes. Both of these are not possible according to (((special relativity))) and to the space/time charts in the video.

Space-time is not the root level of reality. It's an emergent structure from something much deeper that we do not yet understand.

[–] • 2 pts

You might wanna provide an archive link with .gov urls.

[–] • 0 pt

ok

[–] • 1 pt

Isn't this just the equivalent of having a roll of a die whose result is secret, written on two pieces of paper, each mailed to different locations, then opened simultaneously and wow, they are the same result, must be instantaneous transmission?

[–] • 1 pt

Bell thought so. Came up with the Bell inequality to prove it. And his inequality proved the opposite under experiment.

[–] • 0 pt

I mean practically for secure information transfer. Bell did show that it can't actually be like that, but it can be treated like that for this use (correct me if I'm wrong). It's as if there's a secret coin flip whose results go to both parties. They can both find out the result simultaneously, but it doesn't allow instantaneous information transfer.

[–] • 0 pt (edited )

No, it's not because the outcomes are not random.

[–] • 0 pt (edited )

If you understand it you can give a short rebuttal as to why it's not like that (you ninja-edited your ad hom out after I wrote this). From Jewpedia:

Quantum teleportation is a technique for transferring quantum information from a sender at one location to a receiver some distance away. While teleportation is commonly portrayed in science fiction as a means to transfer physical objects from one location to the next, quantum teleportation only transfers quantum information. The sender does not have to know the particular quantum state being transferred. Moreover, the location of the recipient can be unknown, but to complete the quantum teleportation, classical information needs to be sent from sender to receiver. Because classical information needs to be sent, quantum teleportation cannot occur faster than the speed of light.

From what I've ever read about it, it's only useful for establishing a secret key between participants, e.g. a one-time pad, but it's not useful for FTL communication. Farther down:

The quantum channel is the communication mechanism that is used for all quantum information transmission and is the channel used for teleportation (relationship of quantum channel to traditional communication channel is akin to the qubit being the quantum analog of the classical bit). However, in addition to the quantum channel, a traditional channel must also be used to accompany a qubit to "preserve" the quantum information. When the change measurement between the original qubit and the entangled particle is made, the measurement result must be carried by a traditional channel so that the quantum information can be reconstructed and the receiver can get the original information. Because of this need for the traditional channel, the speed of teleportation can be no faster than the speed of light (hence the no-communication theorem is not violated). The main advantage with this is that Bell states can be shared using photons from lasers making teleportation achievable through open space having no need to send information through physical cables or optical fibers.

tl: dr: it's just a more secure way to transfer information than other means.

[–] • 0 pt

As long as there is no communication from the ship, during the faster than light travel, there is no paradox.

[–] • 0 pt

A lot of these paradoxes seem to boil down to that. "But we get the (slow) signal at the wrong time!" No, the slow signal took longer so naturally the order will be different. If you can explain the effect coherently on a diagram, it means there's no paradox. It seems to boil down to an optical illusion not being acknowledged as such. We tend to perceive light as telling us what's happening right now, but that's not true at great distances. It's like the postal mail.