Time Travel 122 replies

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emonkies

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17th July 2003

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#11 15 years ago
colonel_bobYes. The only problem is, nothing can go faster than light... Its like the Energizer Bunny of the Universe. However fast you go, light is still going 186,000 some-odd miles per second faster than you.

http://www.washingtonpost.com/ac2/wp-dyn?pagename=article&contentId=A9431-2000Jul19&notFound=true

Not much else to say really.




AzH

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#12 15 years ago

Anlushac11http://www.washingtonpost.com/ac2/wp-dyn?pagename=article&contentId=A9431-2000Jul19&notFound=true

Not much else to say really.

actually, that doesn't really prove anything. if light travels faster than light then the speed of light is increased, rather than, as you suggest, something travelling faster than light...




Nemmerle Forum Mod

Voice of joy and sunshine

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#13 15 years ago

E=MC^2 Energy = matter destroyed times the SPEED OF LIGHT squared.




Mast3rofPuppets VIP Member

08'aIgnorance is not an excuse

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#14 15 years ago

What would happen if you would travel back and kill your own mother when she was a baby? :lookaround:




AzH

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#15 15 years ago
Mast3rofPuppetsWhat would happen if you would travel back and kill your own mother when she was a baby? :lookaround:

you can't. if we develop FTL travel you will be able to view past events, but not interact.




Nemmerle Forum Mod

Voice of joy and sunshine

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#16 15 years ago

That’s a rather broad claim, would you care to explain it?




!moof

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#17 15 years ago

Ged, E=MC^2 means energy (E) equals mass (M) times the speed of light (C) squared.

The FTL transmission may be a breakthrough. Unfortunately, black holes cannot gove out information as incorrectly hypothesized by Hawking, and the current idea is too primitive to have any real promise. We have no idea where that will go.




AzH

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#18 15 years ago
GedThat’s a rather broad claim, would you care to explain it?

i already did. ;)

Viewing the past

This method is generally the one that most scientists talk about when they discuss time travel. When they talk about how time travel is possible, they usually talk about finding some way to travel faster than the speed of light. If a light beam is sent and afterward we activate time travel, we overtake the light and, in effect, see it sent off again from our new location. So when a "moment" occurs, we can head out beyond the light waves of that moment and see it again. Due to the immense distance required, this method is usually discussed in terms of traveling to solar systems far beyond our current capabilities.

In this method of time travel, we have no ability to interact with what happened. We can only observe. The most notable example of this type of time travel is stars. We see the light waves they sent off years ago, but have no way of interacting with the occurrences because they:

* Are too far away * Have already happened

So with this in mind, we want to see JFK's murder. To do this we must travel faster than the light waves carrying those moments and view them.

OK, so Friday Nov. 22, 1963, 12:30:07 PM CMT is the time we are looking to witness. Around Elm Street Dallas Texas is the location.

In order to witness the event we must first calculate which direction that part of the Earth was facing so we know the best route to find the correct light waves. It does us no good to just zoom off past the speed of light. We would most likely head in the wrong direction. After all, the light waves from an event don't pass through the Earth and head out equally in all directions. Just as an astronaut on the other side of the moon could not get our attention with flares.

So we calculate the approximate location of the light waves. Now we must catch up to them.

Is faster than light speed possible? Not currently. It won't happen any time soon. Right now the most common theory as to how to do it involves bending space so you have a shorter travel distance than the light wave. However regardless of the theory and/or technique used faster than light travel still involves traveling through space faster than 186,000 miles per second. That's well out of our grasp so far. It will occur, but not yet.

But for the sake of argument let's pretend 100x light speed is currently possible. A ship takes off in the right direction, speeds out, overtakes the light rays and prepares its telescopes and recorders.

Now let's think about this for just a moment. Those light rays are going to be very far away. Well past the planet Pluto.

Let's take our best telescope (Hubble, if I'm not mistaken) and point it at Pluto. Let's pretend the telescope is 100x more powerful than it is right now. How much specific detail do you think we can see?

In a word, zero. Light dissipates as it travels just like any other wave. The details get blurrier the farther you go. This is simple physics.

We make devices to clear up and focus as best as we can, but the fact is we will never be able to make a device fast enough or clear enough to be able to zoom in on the famous assassination.

OK, so let's make things a little more reasonable. Let's pretend an attack occurred just 5 minutes ago and we can travel fast enough to see the event occur again 2 minutes from now. We can see what happened and head back to report the details missed the first time.

That is, as long as they occurred out in the open. No light waves could travel from an event, out the window and bank up toward our spacecraft for us to see and no passive "x-ray" types of technology exist. They all require us to shoot something into the area and view the results. But since what we want to see already happened, we have no chance to "x-ray" anything. No decent information would probably be available.

All this of course is still presupposed on the concept of faster than light travel, which is still much too fast for us yet. When (and if) FTL speed is reachable than this type of time travel will be possible.

However in truth it is less time travel and more space travel.

Is time travel viewing the past possible? Yes, but not yet.

see the link ^up ^there for info on the other four types of time travel...




Nemmerle Forum Mod

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#19 15 years ago
moofGed, E=MC^2 means energy (E) equals mass (M) times the speed of light (C) squared.

Mass in this formula is destroyed.




Guest

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#20 15 years ago

A man from the future came to the present in 2000-2001 and warned us of a nuclear war in a few years, I think 8. Also America kills itself for a while in a civil war. Actually it was complete bull. Still a good read. www.johntitor.com