263 réponses à ce sujet

[Whatever42]

Seraphithan wrote...

What about tachyons or are those no longer around?

Completely hypothetical particle. It's in the same book as wormholes, string theory, alternate universes, and unicorns.

Modifié par Whatever666343431431654324, 31 mars 2011 - 10:12 .

[CitizenSnips]

Whatever666343431431654324 wrote...

maxut85 wrote...

I don't really understand your explanation of why faster than speed of light is impossible.

Well, first you have to understand the concept of space-time. There is no such thing as space. There is no such thing as time. There is only space-time.

Actually, everything moves through absolute space-time at the same rate. The faster you travel through space, the slower you travel through time. Light travels only through space, not through time. So it is the maximum speed you can travel through space.

And there is absolute and relative space-time as well, which does make things confusing (at least for me).

If you are standing still and there is a train approaching you to your right at 100kph and there is a train approaching you from your left at 100kph then to you, each train is going 100kph. However, to each train, the other train is approaching it at 200 kph relative to themselves. 

Now the wierd thing about light is that if a beam of blue light is coming at you from the right and a beam of red light is coming at you from the left, each beam, relative to you, is going the speed of light. However, to the red beam of light, the blue beam is not approaching it at twice the speed of light but just at the speed of light.

Wierd, huh?

Black holes supercede the current laws of physics and space-time.

[Pwener2313]

stonbw1 wrote...

I'm not a scientist, but there is some school of thought that the universe is expanding (or did)quicker than the speed of light. If you subscribe to the Big Bang theory, the universe was a spec and one millisecond later, it was well, pretty big. And it continues to grow . . .wah, wah, wah

Ah yes, the "Big Bang" theory. what a load of crap. One guy in a wheelchair who loves to be an idiot (evolution? we evolved from monkeys and fish? Then why are there still monkeys and fish? What an idiot). Yes, the universe is expanding, but if I tell you why I'll be jumped by the surprising number of atheist in this website.

[Whatever42]

mushoops86anjyl wrote...

Black holes supercede the current laws of physics and space-time.

How so?

Modifié par Whatever666343431431654324, 31 mars 2011 - 10:12 .

[Minister of Sound]

I think the OP suffers from the psychological concept of confirmation bias.

[thatbwoyblu]

Its impossible because God said so but God obviously don exist in Mass Effect.

[AdmiralCheez]

Seraphithan wrote...

What about tachyons or are those no longer around?

No evidence has been put forward that they actually exist.  It'd be cool if they did, though.

[Whatever42]

Pwener2313 wrote...

stonbw1 wrote...

I'm not a scientist, but there is some school of thought that the universe is expanding (or did)quicker than the speed of light. If you subscribe to the Big Bang theory, the universe was a spec and one millisecond later, it was well, pretty big. And it continues to grow . . .wah, wah, wah

Ah yes, the "Big Bang" theory. what a load of crap. One guy in a wheelchair who loves to be an idiot (evolution? we evolved from monkeys and fish? Then why are there still monkeys and fish? What an idiot). Yes, the universe is expanding, but if I tell you why I'll be jumped by the surprising number of atheist in this website.

Darwin wasn't in a wheelchair. And we never evolved from Monkeys. We had a common ancestor with other primates but we never evolved from them. Just wanted to clarify that - let's not debate.

But the universe expanding is pretty interesting, actually. Because the rate of expansion is increasing (which points to a heat death or big tear) but the rate of expansion wasn't always accelerating. At one point the rate of expansion was actually decreasing. That's where the theory of dark energy and dark matter came from. They think that dark matter may have added gravity to the universe, which slowed the rate of expansion but after a certain point it was overwhelmed by dark energy and the rate of expansion increased.

But dark matter and dark energy are simply code words for "there is something wierd out there that we don't understand".

[UKStory135]

The reason that you can't travel the speed of light is because as an object with mass accelerates toward the speed of light, their mass approaches infinity. Thus, it would take an infinite amount of energy to move just one atom at the speed of light.

Maybe, Mass Effect fields manipulate mass and gravity, so theoretically the ship can be made to be inside a Zero Mass field that is then accelerated at faster than light. Or maybe since gravity is literally the mass based bending of space time, they mass effect fields can create enough mass or gravity to make an object fall into its destination at FTL speeds.

[CitizenSnips]

Whatever666343431431654324 wrote...

mushoops86anjyl wrote...

Black holes supercede the current laws of physics and space-time.

How so?

Basically it's because of the "singularity", the point at which the black hole has zero volume and infinite density. The laws of modern physics can not work under such conditions and therefore can not explain what happens at that point. It's one of the reasons black holes are the "wizard did it" of science fiction. There's a good article on it here:

http://www.space.com...-spacetime.html

[Halfdan The Menace]

Tazzmission wrote...

ModestmeNTaLmogul wrote...

It is possible,did you ever heard of the wormhole theory? plus scientists are developing hyperdrive technology.

we have the technology but the government wont be able to profit from it like they do from oil sadly. just wanna point that out. i mean for christ sakes we have moon rocks locked up in a nasa building and they wont mine for helium 3? with all the money on the space program youd think they invest in that

Yeah,money is the problem! Money is the root of a lot of problems! the so called happy papers make us feel miserable! money has been manipulating us for centuries!!  screw money! screw world currency!

[IntoTheDarkness]

What is about "EPR entanglement?" I heard this notion of moving faster than light somewhere on web but I can't seem to find some kind explanations.

Modifié par IntoTheDarkness, 31 mars 2011 - 10:27 .

[Tazzmission]

this kid is autistic and has a higher IQ than einstein id like to see what he says on ftl


http://news.yahoo.co...-skys-the-limit

[Halfdan The Menace]

thatbwoyblu wrote...

Its impossible because God said so but God obviously don exist in Mass Effect.

You mean Chuck Norris said so?

[Whatever42]

mushoops86anjyl wrote...

Whatever666343431431654324 wrote...

mushoops86anjyl wrote...

Black holes supercede the current laws of physics and space-time.

How so?

Basically it's because of the "singularity", the point at which the black hole has zero volume and infinite density. The laws of modern physics can not work under such conditions and therefore can not explain what happens at that point. It's one of the reasons black holes are the "wizard did it" of science fiction. There's a good article on it here:

http://www.space.com...-spacetime.html

That doesn't say that it has zero volume. It says that "...mass is packed into a tiny volume, squished to its ultimate density" and that time "...essentially stands still". That makes perfect sense given relativity.

Since you have an incredibly severe warping of space-time, mass is so compacted that even the sub-atomic particles are packed together so tight that basically nothing is happening. After all, we are all almost entirely empty space. The only reason we can even interact with anything is because of the forces binding our atoms together.

What's really interesting about black holes is Hawking radiation. That stuff confuses the heck out of me.

[UKStory135]

Whatever666343431431654324 wrote...

maxut85 wrote...

I don't really understand your explanation of why faster than speed of light is impossible.

Well, first you have to understand the concept of space-time. There is no such thing as space. There is no such thing as time. There is only space-time.

Actually, everything moves through absolute space-time at the same rate. The faster you travel through space, the slower you travel through time. Light travels only through space, not through time. So it is the maximum speed you can travel through space.

And there is absolute and relative space-time as well, which does make things confusing (at least for me).

If you are standing still and there is a train approaching you to your right at 100kph and there is a train approaching you from your left at 100kph then to you, each train is going 100kph. However, to each train, the other train is approaching it at 200 kph relative to themselves. 

Now the wierd thing about light is that if a beam of blue light is coming at you from the right and a beam of red light is coming at you from the left, each beam, relative to you, is going the speed of light. However, to the red beam of light, the blue beam is not approaching it at twice the speed of light but just at the speed of light.

Wierd, huh?

Edit: FF4 doesn't like it when you cut and paste images.  I'll repost it on IE
Here's some Big Bang Proof:
en.wikipedia.org/wiki/COBE

Modifié par UKStory135, 31 mars 2011 - 10:33 .

[Whatever42]

IntoTheDarkness wrote...

What is about "EPR entanglement?" I heard this notion of moving faster than light somewhere on web but I can't seem to find some kind explanations.

Quantum entanglement is amazing. It's not actually moving faster than the speed of light. It's essentially instantaneous teleportation. Relativity on the quantum level takes a vacation, absolutely. And we have really very few theories about quantum behaviour - we mostly just observe and go WTF?

There is a quatum entanglement codex entry which is good (although FTL communication doesn't work with it unfortunately). But if you really want to read something cool:

http://www.technolog...og/arxiv/24759/

Energy teleportation!!

Modifié par Whatever666343431431654324, 31 mars 2011 - 10:39 .

[KenKenpachi]

As some have pointed out there may be ways around it. Also note 90% of what we know in reguards to space travel and the like is scientific theory. Not Scientific Fact, or Law. And thus isn't but the best idea we have to work with. But can be renderd mute or wrong at a momments notice. In fact once it was Scientific theory that the moon was mainly a thick layer of dust, that prompt us to launch numerous probes to basically crash into the Moon and see if that was true or not.

We know it wasn't now. We no so little about our own planet nevermind the vastness of space. In fact FTL may very well be possible via a number of means. And short of Century Ships is the only way we'll ever explore space, so lets hope that theory is in correct, or one day all of humanity will die on this sad little mud ball.

[Tazzmission]

KenKenpachi wrote...

As some have pointed out there may be ways around it. Also note 90% of what we know in reguards to space travel and the like is scientific theory. Not Scientific Fact, or Law. And thus isn't but the best idea we have to work with. But can be renderd mute or wrong at a momments notice. In fact once it was Scientific theory that the moon was mainly a thick layer of dust, that prompt us to launch numerous probes to basically crash into the Moon and see if that was true or not.

We know it wasn't now. We no so little about our own planet nevermind the vastness of space. In fact FTL may very well be possible via a number of means. And short of Century Ships is the only way we'll ever explore space, so lets hope that theory is in correct, or one day all of humanity will die on this sad little mud ball.

the truth is we may not be taught the actual truth in science classes either. look up john lear and his comments about fftl and alien contact . he is former cia

[UKStory135]

Gotta love XKCD!

[AlanC9]

Pwener2313 wrote...
...but if I tell you why I'll be jumped by the surprising number of atheist in this website.

At the risk of a derail, why is this surprising to you?

[Whatever42]

UKStory135 wrote...

Gotta love XKCD!

Always!

[CitizenSnips]

Whatever666343431431654324 wrote...

mushoops86anjyl wrote...

Whatever666343431431654324 wrote...

mushoops86anjyl wrote...

Black holes supercede the current laws of physics and space-time.

How so?

Basically it's because of the "singularity", the point at which the black hole has zero volume and infinite density. The laws of modern physics can not work under such conditions and therefore can not explain what happens at that point. It's one of the reasons black holes are the "wizard did it" of science fiction. There's a good article on it here:

http://www.space.com...-spacetime.html

That doesn't say that it has zero volume. It says that "...mass is packed into a tiny volume, squished to its ultimate density" and that time "...essentially stands still". That makes perfect sense given relativity.

Since you have an incredibly severe warping of space-time, mass is so compacted that even the sub-atomic particles are packed together so tight that basically nothing is happening. After all, we are all almost entirely empty space. The only reason we can even interact with anything is because of the forces binding our atoms together.

What's really interesting about black holes is Hawking radiation. That stuff confuses the heck out of me.

Bad wording. Singularity is the word given to describe infinite density, zero volume. True, general relativity itself predicts the infinite denstity of black holes, but then breaks down once that infinite density is reached. As far as we know, when infinite density, or singularity,  is reached, space-time no longer exists. The only thing we can do with singularities is speculate.

Edit:

http://www.pbs.org/w...tml/blackh.html

The formatting is terrible but this looks like a page from Steven Hawking's show on PBS regarding black holes and singularities.

Modifié par mushoops86anjyl, 31 mars 2011 - 10:43 .

[JKoopman]

Pwener2313 wrote...

stonbw1 wrote...

I'm not a scientist, but there is some school of thought that the universe is expanding (or did)quicker than the speed of light. If you subscribe to the Big Bang theory, the universe was a spec and one millisecond later, it was well, pretty big. And it continues to grow . . .wah, wah, wah

Ah yes, the "Big Bang" theory. what a load of crap. One guy in a wheelchair who loves to be an idiot (evolution? we evolved from monkeys and fish? Then why are there still monkeys and fish? What an idiot). Yes, the universe is expanding, but if I tell you why I'll be jumped by the surprising number of atheist in this website.

Oh lord...

Here's something for you to consider. We know that the universe is expanding. We know the rate at which it's expanding. If 5 minutes from now the universe will be larger, then the inverse must also be true and thus 5 minutes ago the universe must've been smaller. Since we can measure the rate of expansion, we can predict where it'll be tomorrow and also determine where it was yesterday. Using the awesome power of math, we can trace the rate of expansion back about ~13 billion years to where logic says that it must've originated from a single point in space-time.

But you're right; a magical bearded man in the sky "magiking" the universe into existence in 6 days and then covering it up and intentionally creating mountains of evidence to the contrary simply to test our faith is far more plausible.

And Jebus dude, at least make an effort to understand evolution before you try to mock people who've spent their entire lives studying and developing it. You sound like one of those people who stand outside schools and libraries with signs that read, "My gram'ma weren't no monkey!" Let me ask you a question: If evolution doesn't exist, why then are there over 150 different breeds of dog in the world and not just 1?

Modifié par JKoopman, 31 mars 2011 - 10:43 .

[UKStory135]

darn you firefox!

Modifié par UKStory135, 31 mars 2011 - 10:45 .