Warp - any scientific take on it?

[chequita guevara]

I read that one version of super string theory allows for warp travel.

[FrostyBoy]

Few questions:

Is light's speed constant?

How can light have any effect on physical objects in time? Or is the speed of light just being used as reference?

If all this comes down to what IMAGES we see and WHEN we see them, how does this effect a blind man?

[Lul Thyme]

Originally posted by Sn00py
Few questions:

Is light's speed constant?

How can light have any effect on physical objects in time? Or is the speed of light just being used as reference?

If all this comes down to what IMAGES we see and WHEN we see them, how does this effect a blind man?

This has nothing to do with seeing or images or when we see them.

It's called the speed of light but it could be called speed of electromagnetic radiations, or something even more general.

Don't get hung up about the light part.

[chequita guevara]

The speed of light in a vacuum is constant.

[KrazyHorse]

Originally posted by Krill
Depends how you interpret what happens.

No, it doesn't.

[KrazyHorse]

Originally posted by Kuciwalker
Elaborate.

http://en.wikipedia.org/wiki/General_relativity

No purely SR mechanism can propagate info faster than c

The same is not obviously true of GR

[KrazyHorse]

Originally posted by TCO
You should be able to explain it. If it is physical. In physical terms.

No, you shouldn't. There is a fundamental disconnect between your brain's interpretation of what space and time are, and what SR says they are.

[KrazyHorse]

Originally posted by Sn00py
Few questions:

Is light's speed constant?

How can light have any effect on physical objects in time? Or is the speed of light just being used as reference?

If all this comes down to what IMAGES we see and WHEN we see them, how does this effect a blind man?

The speed of light is the same as the speed of any other particle with rest mass 0

[KrazyHorse]

Originally posted by KrazyHorse

http://en.wikipedia.org/wiki/General_relativity

No purely SR mechanism can propagate info faster than c

The same is not obviously true of GR

More particularly, you require a quantum theory of gravity.

You can maintain GR on large scales, but violate c on small scales without violating causality even on small scales.

[Joseph]

Read this.

[edit] "Faster-than-light" observations and experiments
Main article: Faster-than-light

The blue glow in this "swimming pool" nuclear reactor is Cherenkov radiation, emitted as a result of electrons travelling faster than the speed of light in water.It has long been known theoretically that it is possible for the "group velocity" of light to exceed c [3]. One recent experiment made the group velocity of laser beams travel for extremely short distances through caesium atoms at 300 times c. In 2002, physicists Alain Haché and Louis Poirier made history by sending pulses at a group velocity of three times light speed over a long distance for the first time, transmitted through a 120-metre cable made from a coaxial photonic crystal.[2] However, it is not possible to use this technique to transfer information faster than c: the velocity of information transfer depends on the front velocity (the speed at which the first rise of a pulse above zero moves forward) and the product of the group velocity and the front velocity is equal to the square of the normal speed of light in the material.

Exceeding the group velocity of light in this manner is comparable to exceeding the speed of sound by arranging people distantly spaced in a line, and asking them all to shout "I'm here!", one after another with short intervals, each one timing it by looking at their own wristwatch so they don't have to wait until they hear the previous person shouting. Another example can be seen when watching ocean waves washing up on shore. With a narrow enough angle between the wave and the shoreline, the breakers travel along the wave's length much faster than the wave's movement inland.

[Kuciwalker]

Originally posted by KrazyHorse

http://en.wikipedia.org/wiki/General_relativity

No purely SR mechanism can propagate info faster than c

The same is not obviously true of GR

First global conservation of energy, now this general relativity, is there any evil you won't do?

[KrazyHorse]

I think I'm going to CERN this summer for a couple of weeks.

[Jon Miller]

GR (mixed with quantum physics) is crazy ****.

In my particle physics classes, Quantum Gravity was the stuff I didn't understand. It seemed to break my understanding. About the same time I decided to go into another field.

I haven't gone back to it, so I am not even sure, right now, if I can understand it.

Jon Miller

[FrostyBoy]

http://www.youtube.com/watch?v=tpbGuuGosAY&mode=related&search=

Just while i'm posting this, can anyone tell me how to imbed video's into posts?

[Drake Tungsten]

There is a fundamental disconnect between your brain's interpretation of what space and time are, and what SR says they are.

Does that mean it's ok for me to not understand what the **** Kuci is talking about?