Light Speed = Time Travel? | Page 4 | Science and Beyond | Guild Forums

Derelict Pants

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Posted: Thu Jul 30, 2009 10:11 am

From what I have heard, dark matter may hold the answer to light-speed travel. Dark matter is the force pulling or spreading the universe apart...... Or something like that. I should have paid more attention. sweatdrop

Posted: Fri Jul 31, 2009 10:41 pm

I believe in time travel. Just not necessarily in the way you described. What you said reminds me of this theory that to be "invisible" is to be moving faster than everything around you, so fast it can be seen with the naked eye. But thats unrelated

zeula

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SirKirbance

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Posted: Thu Nov 05, 2009 8:33 pm

Jerba2

...When you stand still, time goes at a normal speed. As you approach the speed of light, time goes by slower. If you go at the speed of light, time stops. If you go faster than the speed of light, time will go backwards, but the latter is impossible due to the fact that nothing can go faster than light speed through the fabric of space-time.

Relativity however states that all motion is relative, you can never define "standing still" though it is true that faster speed causes time to be observed as slwing down. When I asked a physics professor how this works when all motion is relative (who is the one actually moving?) she said it depends on measuring acceleration. Acceleration is measurable under relativity, so if one body accelerated then you can say its motion has changed, though its absolute motion still uncertain.

Cronos the Timekeeper

iMrchoxie

When one would travel the speed of light, things indeed stand still, but wouldn't you be able to see the light around you? Or would it be traveling alongside you?

I suppose technically you wouldn't be able to see anything behind you only in front of you as the light photons are moving at the same speed as you so therefore they wouldn't be hitting your retinas when you look back only when looking forward towards where your moving and hitting the ones coming towards you.

Relativity also states that the speed of light is constant regarless of motion: it never travels more slowly or more quickly to any observer regardless of their motion relative to the light source. However light can be red shifted or blue shifted due to the dopler effect. If you traveled at near the speed of light away from a light source then the photons would be red shifted to a nearly zero frequency, so they would be impossible to see.

Posted: Thu Jan 28, 2010 6:39 pm

Sun Charm

I learned that in science that if you travel at light speed you will move so fast that everything will stand still so you will move forward in time or something like that. I think it was the oppisite of that but anyway do you think that is possible?

If you travel at light speed for 1 hour, 1 week passes for the rest of the universe. That's just kinda how it works. However, speed has nothing to do with time at all. The concept of time is actually a very hard thing to grasp.

I recommend first off looking up and reading on dictionary.com all the definitions on time. Then, look up the word speed. Speed cannot be calculated without time. But they are not related at all.

It isn't possible and never will be for anything that is organic. At G's past 30, the human body is liquefied. At light speed, the G's would be infinite.

Silvercast90

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Venetian-Owl

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Posted: Sun May 02, 2010 9:39 am

Sun Charm

I learned that in science that if you travel at light speed you will move so fast that everything will stand still so you will move forward in time or something like that. I think it was the oppisite of that but anyway do you think that is possible?

Look up Nicola Tesla. This guy's done it; if you believe his story anyway, but I do.

Posted: Sat Oct 16, 2010 7:49 pm

I LOVE how this works. Basically you cant go faster than light - and time will make sure of that. If you are on a train moving almost the speed of light and you run forward you would technically move faster than light. But since speed is dependent on time - time will slow down so you cant break the limit. So everything moves faster and you technically move into the future.

And they are saying you cant open a portal to the past because if you tried the "feedback" will close it instantly.

emuthesuperhero

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SirKirbance

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Posted: Fri Dec 31, 2010 10:07 am

Silvercast90

Sun Charm

I learned that in science that if you travel at light speed you will move so fast that everything will stand still so you will move forward in time or something like that. I think it was the oppisite of that but anyway do you think that is possible?

If you travel at light speed for 1 hour, 1 week passes for the rest of the universe. That's just kinda how it works. However, speed has nothing to do with time at all. The concept of time is actually a very hard thing to grasp.

I recommend first off looking up and reading on dictionary.com all the definitions on time. Then, look up the word speed. Speed cannot be calculated without time. But they are not related at all.

It isn't possible and never will be for anything that is organic. At G's past 30, the human body is liquefied. At light speed, the G's would be infinite.

That is technically correct. My understanding is that time dilation has to do with acceleration, not velocity (speed), Einstein's most famous equation is E=mc^2. Whenever you accelerate an object you add energy and that energy is equivalent to a very small amount of mass. However approaching the speed of light the energy added is sufficient to be equivalent to a huge amount off mass (infinite mass if the impossible goal of light speed for a massive object were reached). Near light speed this extra mass derived from the energy of acceleration greatly increases an objects inertia. This has two effects. First, further acceleration becomes increasingly difficult and physical processes slow down due to the huge inertia of all particles comprising the object. If physical processes in your body have slowed you will age slowly, and observe the outside (nonaccelerated) world as passing by more quickly.

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