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old Re: Light speed travel technology

Erik963
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I saw someone saying about infinite space. I gota say space is finite it studied it for a long time. There is big ammout of theoryes. Space is finite its about 4000 000 000 000 light years old and it is expanding every second. Also there is question what will happen if you go faster than the space itself. Answer is you will travel in time. Whole space is just a big time loop. It is certainly inpossible to travel faster than space but who knows maybe once we will be able to do that.


user made in Finland has written
user A Mad Bro has written
the universe avtually can't be infinite cause it still expands.
Oh yeah? what's behind the edge?




@Bloodshot

Acutaly they were allready here at our solar system, at earth. I think it was before 3000 years. You may think i am crazy but i was reading all kind of books searching trought internet, watching tv hearing all kind of storyes watching documentary films about them. And if mayans calendar is right than they should land in 2012. Mayans had contacts with them. They were tons of landing sites found at their colonies, but there were so little facts that it was certainly inpossible to say it's truth. If they can do that why can't WE ? Also i dont belive we are only one living spiecies in the space it is inpossible. As known our life didnt start at earth. It was some kind of meteor with very small amout of life form that crashed on "earth" when it came into being. As we know our life started with bacteries and after milions of years it improved.

So how we know that meteor wasnt part of bigger one which colided somewhere else. It is proved that life can start at any conditions, and some condiction can dramaticly speed up evolution process. So thouse"species" can be 3000 or more years more intelligent that humans.


As i said behind the edge is the beggining. You will travel back to time or to future. Another theory is another dimenssion where physic we know here is completly different there.
edited 1×, last 05.08.11 10:30:17 am

old Re: Light speed travel technology

Apache uwu
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Our technology hasn't developed enough--not even close to light speed.

And even if we could achieve it the next galaxy is still many light years away...

old Re: Light speed travel technology

Alistaire
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You can't travel faster than light; first because the faster you go, the slower time passes by. If you'd have a 1 years old child and you're 18, then travel 17 years at the speed of light and come back on earth, you'd be as old as your child (18 in this case).
Of course you'd be dead too, cause of the G powers.

Another thing; the faster you go, the more fuel you need to go faster. The startup of a car needs more fuel than the actual driving (till +/- 50 km/h), but when you'd drive at 700 km/h (which is only possible with fuel-raping engines) it'd take a lot more fuel than when you'd drive at 100 km/h.

This differs with fuel and engines, but not one engine ever made on the earth can reach the speed of light, mainly cause it will cost really much fuel to get in space first and you need a huge ammount of fuel (About 2 huge-ass fueltanks) to travel +/- 20.000 km/h. Guess how many fuel you'll need to travel 1.080.000.000 km/h (Light's speed/hour).

Another thing; the speed of light is not as fast as you might think. It takes 25.000 years with the speed of light to fly to the closest galaxy. Call that fast?

old Re: Light speed travel technology

DannyDeth
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Meh, we are probably never going to be able to travel at light speed safely because of the materials we build with not being able to withstand collisions with any other form of matter at that speed.

old Re: Light speed travel technology

A Mad Bro
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user Alistaire has written
If you'd have a 1 years old child and you're 18, then travel 17 years at the speed of light and come back on earth, you'd be as old as your child (18 in this case).
Of course you'd be dead too, cause of the G powers.


wrong. you would be 18 years older and your child would be 1 year old. the faster you are, the slower time goes by around you.

and the stuff about G powers would be ok if you dont accelerate too fast.

old Re: Light speed travel technology

DannyDeth
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Actually, a human moving at light speed would stop them from being able to breathe as well as stopping them from being able to see anything other than the world's blur moving past them, since our eye sight 'refreshes' only ~50-60 times per second ( hence why 3D monitors operate at 120Hz and above ).

EDIT: And, actually, time would not slow down, it would only SEEM slower, provided that you were operating at the speed of light in your mind and body as well.

old Re: Light speed travel technology

Lee
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@OP
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I saw someone saying about infinite space. I gota say space is finite it studied it for a long time. There is big ammout of theoryes. Space is finite its about 4000 000 000 000 light years old and it is expanding every second. Also there is question what will happen if you go faster than the space itself. Answer is you will travel in time. Whole space is just a big time loop. It is certainly inpossible to travel faster than space but who knows maybe once we will be able to do that.


There's no indication of that. If anything, since the universe is what we define to be space+time, the concept of time nor space would exist outside of our universe. Also, expansion isn't constant as time isn't axially independent of space. Imagine the topography of the earth, now while we perceive it to be flat and planar, it is obviously not the case. For the same reason, the time-space mesh is also curvaceous. For example, think of a gas in a glass cube, the concentration of the gas models how fast time flows, and the space models, well, the 3 dimensional universe. Now under certain conditions, these gasses may seem to be uniform, but more likely, there are certain spots with higher concentration of gas than others. Since the universe defines time, I wouldn't be surprised at all if not only could we not observe what lies beyond its edges, we cannot even observe the edges.


@Cuchulainn
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Of course you'd be dead too, cause of the G powers.


If the upper limit of speed is the speed of light, you would not be able to accelerate once you attain this speed, hence there are no G forces at the speed of light. In fact, assuming infinite energy, it's completely possible plan out a route that can accelerate yourself to the speed of light without exceeding the minimum acceleration required to reach escape velocity from the sealevel. This would use the same amount of energy (assuming that life support consumes no energy) as that of an near instantaneous acceleration (assuming still that the total distance traveled far exceeds the reach of Earth's atmosphere)

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Another thing; the faster you go, the more fuel you need to go faster. The startup of a car needs more fuel than the actual driving (till +/- 50 km/h), but when you'd drive at 700 km/h (which is only possible with fuel-raping engines) it'd take a lot more fuel than when you'd drive at 100 km/h.


Vacuum space retain near zero resistance, hence your velocity is conserved unless you attempt to accelerate. If you go at 100kmph in space, you will stay at that speed unless some external force influences your speed. As propulsion is only needed for acceleration, you would not need any more fuel. On earth, your reasoning makes sense from experience because we constant apply more gas in order to retain our velocity.

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This differs with fuel and engines, but not one engine ever made on the earth can reach the speed of light, mainly cause it will cost really much fuel to get in space first and you need a huge ammount of fuel (About 2 huge-ass fueltanks) to travel +/- 20.000 km/h. Guess how many fuel you'll need to travel 1.080.000.000 km/h (Light's speed/hour).


Propulsion engines provide acceleration, not speed. Looking at an energy model of the system, we have E[ground state] = mc^2, and we try to find the energy of an object of mass m at a velocity of v, which is a multiple of E[ground state] by a factor gamma such that γ = (1 − v^2/c^2)^−1/2

as v approaches c, gamma approaches the inverse root of 0, which is infinity, hence the hypothetical speed barrier that objects with initial energy at ground state not being able to exceed the speed of light, as it would take an infinite amount of energy.

Now to illustrate this point more clearly, assuming that the fuel weighs absolutely nothing. A fairly efficient nuclear weapon discharges around 10^6 tons of energy at a fairly heavy weight. This miracle fuel at zero mass would need the power of 10000 of these nuclear weapons to accelerate a person to about 99.99999933% of the speed of light. However, as the mass-energy barrier also exists, we would need at least 4000 additional kilograms of fuel that converts its mass to energy at 100% efficiency and discharges in mass gradually in order to propel a single person towards that speed.

Also, it is possible to be faster than the speed of light, but you would have to have an initial velocity already greater than that of light to begin with, which case your lowest speed would be just a little above the speed of light.

old Re: Light speed travel technology

Mechanolith
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user DannyDeth has written
Actually, a human moving at light speed would stop them from being able to breathe as well as stopping them from being able to see anything other than the world's blur moving past them, since our eye sight 'refreshes' only ~50-60 times per second ( hence why 3D monitors operate at 120Hz and above ).

EDIT: And, actually, time would not slow down, it would only SEEM slower, provided that you were operating at the speed of light in your mind and body as well.

So... vision refreshes at 60FPS? Nice...

old Re: Light speed travel technology

Flacko
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It is technically possible to move faster than light, in fact, it has already been achieved in earth (look Cherenkov radiation).
There probably isn't any absolute limit for speed (as long as you have infinite mass and energy)

However, transporting people at the speed of light is a bit more difficult.

On one hand, any particles you collide with at lightspeed will turn you into swiss cheese.
In the other hand, if you were in vacumm, where you wouldn't collide with any particles, the vacuum itself could be so intense it'll rip you to pieces.

You'd probably choose matter&antimatter as your fuel (in case you discovered a way to store antimatter :P) Since it's the most efficient source of energy (at least, in theory, if it ever gets turned into practice).
Coal, oil, nuclear or whatever energy source we're using nowadays wouldn't be even near to it in terms of efficency.

old Re: Light speed travel technology

Alistaire
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@Flacko

DUDE! That is completely impossible! You come up with the most ridicoulus ideas about the speed of light!

Of course you can't go faster than the speed of light! The faster you go, the more fuel you need, and if you'd even be able to fly at the speed of light (Which is completely impossible), you can't do a shit cause when you try to accelerate you would just stay at the same speed!

And, PEOPLE don't have the ability to store matter and anti-matter cause anti-matter destroys everything AROUND IT! That's why black holes destroy everything and that's why there is no air in space, cause of anti-matter. If there'd be only 1 tiny piece of anti-matter on earth, it would rape the whole environment!

Flacko has written
It is technically possible to move faster than light, in fact, it has already been achieved in earth (look Cherenkov radiation).


Of course it has been achieved on earth to accelerate stuff to light's speed. The only thing is; IT HAS A LOWER WEIGHT than light. Electricity could be faster than light, cause it is no light. The only thing is that you can't possibly make an airship out of plain electricity.

First because it'd kill people in it, second because electricity is not a building material, and third because the fucking space HAS NOTHING to let the ELECTRICITY RUN TROUGH.

old Re: Light speed travel technology

Flacko
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user Alistaire has written
@Flacko
Of course you can't go faster than the speed of light! The faster you go, the more fuel you need

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There probably isn't any absolute limit for speed (as long as you have infinite mass/energy)


user Alistaire has written
And, PEOPLE don't have the ability to store matter and anti-matter cause anti-matter destroys everything AROUND IT! That's why black holes destroy everything and that's why there is no air in space, cause of anti-matter. If there'd be only 1 tiny piece of anti-matter on earth, it would rape the whole environment!

It's true that anti matter destroys matter, that's why it's not viable to use conventional storing methods.

Black holes are just a huge amount of mass concentrated in a small volume, which equals epic gravity force, not much to do with anti matter.
Btw, did you know light can not escape black holes because they produce distortions in space-time around them?
Also, anti matter is not the reason why there's no air in space.

Your last statement is also false. Anti matter has been produced right here (and stored for a short while) without catastrophic consequencies:
http://en.wikipedia.org/wiki/Antihydrogen

Leave anti matter alone bro, it ain't hurt nobody.

user Alistaire has written
Flacko has written
It is technically possible to move faster than light, in fact, it has already been achieved in earth (look Cherenkov radiation).


Of course it has been achieved on earth to accelerate stuff to light's speed. The only thing is; IT HAS A LOWER WEIGHT than light.

Photons are believed to be massless and to not have any electric charge, which means that light doesn't weight almost shit.

The reason because the particles in Cherenkov radiation (protons, electrons and stuff heavier than photons) can move faster than light ON EARTH is because light's speed is dramatically slower that when not in vacumm.

old Re: Light speed travel technology

bezmolvie
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I'm almost too disappointed to respond here due to Cuchulainn's ignorance and blatant showing thereof, but Flacko's right (Except for the part about the radiation. 'Light Speed' is assumed to refer to the constant, not the actual speed of light around you). There is no (conventional) way to go physically faster then that number in the space we see around us (Unless the theories about the top speed of light being increased in some places in the universe hold water, in which case it is - however, we cannot create those, and they still would not be enough to have efficient star travel). There are, like I said, possibly, "shortcuts" which would allow us to get from point A to B faster.

old Re: Light speed travel technology

Erik963
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user bezmolvie has written
I'm almost too disappointed to respond here due to Cuchulainn's ignorance and blatant showing thereof, but Flacko's right (Except for the part about the radiation. 'Light Speed' is assumed to refer to the constant, not the actual speed of light around you). There is no (conventional) way to go physically faster then that number in the space we see around us (Unless the theories about the top speed of light being increased in some places in the universe hold water, in which case it is - however, we cannot create those, and they still would not be enough to have efficient star travel). There are, like I said, possibly, "shortcuts" which would allow us to get from point A to B faster.


Well lets change it a bit. Most people dont belive aliens exist but i do. I was reading every topic and saw tons of documentary movies about them. If they can go so fast, Why cant we ?

old Re: Light speed travel technology

Alistaire
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user bezmolvie has written
There are, like I said, possibly, "shortcuts" which would allow us to get from point A to B faster.


Dude, black holes and worm holes don't exist in the way you want them to. You can't get to them in the first place, cause they are too far away from the earth.

old Re: Light speed travel technology

bezmolvie
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user Alistaire has written
user bezmolvie has written
There are, like I said, possibly, "shortcuts" which would allow us to get from point A to B faster.


Dude, black holes and worm holes don't exist in the way you want them to. You can't get to them in the first place, cause they are too far away from the earth.


First off, you clearly have absolutely no understanding of what a black hole is.

Second off, I didn't say worm hole.

old Re: Light speed travel technology

dENd
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user Erik963 has written
user bezmolvie has written
I'm almost too disappointed to respond here due to Cuchulainn's ignorance and blatant showing thereof, but Flacko's right (Except for the part about the radiation. 'Light Speed' is assumed to refer to the constant, not the actual speed of light around you). There is no (conventional) way to go physically faster then that number in the space we see around us (Unless the theories about the top speed of light being increased in some places in the universe hold water, in which case it is - however, we cannot create those, and they still would not be enough to have efficient star travel). There are, like I said, possibly, "shortcuts" which would allow us to get from point A to B faster.


Well lets change it a bit. Most people dont belive aliens exist but i do. I was reading every topic and saw tons of documentary movies about them. If they can go so fast, Why cant we ?


Ive personaly think WHY do people say that aliens are smarter than us?

Its totaly stupid to think that their smarter and if they were they would totaly find us, right?

Ive think that IF aliens exist then they are now figureing out how to light a fire!
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