Physics

Einstein's 2 postulates (All motion is relative, and the speed of light is constant to all observers) are true, and are the only explanation for why everybody always measures the same speed for light, no matter how fast they are moving. So imagine the man in the car. All motion is relative, so he could think that he's not moving at all and everyone else is zooming at him at almost the speed of light. He puts on his headlights and it looks completely normal because the speed of light is constant. For the others watching him, however, they see him moving at almost the speed of light and his headlights going a little faster than he is, since the lights to them will be going at the same speed of light. As for time slowing down, it has to be true! If someone is moving very very fast and shoots a light out at a mirror moving with him and measures the time it takes for the light to bounce back, he will use the time and the distance to get the speed of light. But a stationary observer doesnt see the light go out and back in a straight line. He sees the light go up diagonally and then back down (like this: /\ and not like this | ) since the person holding the light is moving so fast. For the stationary observer to get the same speed for light and r=d/t, and since d increases, so does time increase. That's why time has to change.

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Athlon 1.2ghz
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Quote:

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Originally posted by Sparky_D:
(1)From the point of the view of the twin on Earth, he/she is stationary. Only the spacecraft is moving away.

(2)From the point of view of the twin on the spaceship, he/she is stationary. Only the Earth is moving away.

(3)Hence, there is no "cancelling" effect.

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***added (1),(2) and (3) in quote for reference.***

Thank you for the reply.

Unfortunately, that is not what I was trying to get to.

Statement (1) and (2) are a no brainer, my question is about what happens when the spaceship gets back to earth (lets ignore the backward journey and the complexities involved with it).

You are looking at the situation from two different points of reference - statement 1 and 2 during the journey.

(1) would mean that the twin travelling would be younger. Agreed?

(2) would mean that the twin on earth would be younger. Agreed?

The problem starts AFTER the journey...

When the spaceship arrives on earth and COMES TO A HALT, there is only one frame of reference from the point of view of both twins.

Certainly, both twins cannot be younger than the other (absurd conclusion here).
That's why I hypothesized the "cancelling effect" because both of them were moving relative to each other at the same speed/acceleration. (see: 1 would mean and 2 would mean.... a few lines before this.)

I am sorry, but your statement (3) is only valid up to the point when the spaceship is moving - I am interested in what happens when the spaceship lands back on earth i.e. when both twins see each other after the journey.

The possible conclusions could be:

1. Both of them are younger than the other (doesn't make sense)

2. The effect is cancelled. (difficult to explain this one)

3. Something missing/wrong about the theory of relativity.

4. We need some other theory/tool to crack this one.

5. It's time to stop overintellectualizing and get on with life.

6. Anyone else?

PS: I know I have made some unconventional statements without proof and other statistical data, but I am not implying that the cancelling effect is true, the discussion is only hypothetical and the intention is to gain knowledge.

https://www.sharkyforums.com/images/.../2005/06/5.gif

[This message has been edited by Rado (edited January 26, 2002).]

This is the answer. When the travelling twin turns around, he experiences accelerations. THis alters the frame of reference drastically.

For more on this topic: http://math.ucr.edu/home/baez/physic...n_paradox.html

Quote:

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Originally posted by Rado:

2. The effect is cancelled. (difficult to explain this one)

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[This message has been edited by sww (edited January 26, 2002).]

Quote:

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Originally posted by sww:
This is the answer. When the travelling twin turns around, he experiences accelerations. THis alters the frame of reference drastically.

For more on this topic: http://math.ucr.edu/home/baez/physic...n_paradox.html



[This message has been edited by sww (edited January 26, 2002).]

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Thanks. https://www.sharkyforums.com/images/.../2005/06/5.gif

if you travel at the speed of light then you'll be a pile of bones by the time you end your trip unless you are frozen or mummified or something.

a light year is ameasure of distance not time.

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Originally posted by Moridin:
Hmmm, how about this brainteaser.

Since nothing can exceed the speed of light is it possible to complete a 100 000 light year trip in YOUR lifetime given a sufficiently fast spacecraft? Why/Why not. https://www.sharkyforums.com/images/.../2005/08/2.gif

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Go into a drugstore, get some RAID and your computer will never have bugs in it ever again (literaly), I guarantee it.

My future system

Quote:

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Originally posted by sww:
This is the answer. When the travelling twin turns around, he experiences accelerations. THis alters the frame of reference drastically.

For more on this topic: http://math.ucr.edu/home/baez/physic...n_paradox.html


[This message has been edited by sww (edited January 26, 2002).]

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There's a reason why this is called Einstein's Twin Paradox. https://www.sharkyforums.com/images/.../2005/08/2.gif

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100,000 light years by whose reference frame? But yes, it is possible because time changes according the the frame of reference, meaning that you could do it, but nobody or nothing you remember would still be around when you returned...

Quote:

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Originally posted by Moridin:

Since nothing can exceed the speed of light is it possible to complete a 100 000 light year trip in YOUR lifetime given a sufficiently fast spacecraft? Why/Why not. https://www.sharkyforums.com/images/.../2005/08/2.gif

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there is a locked topic on how to make a H-bomb!!! is this real??? reading it was a good laugh!
some people are quite crazy.
this is goint on my list as the funnyest forum topics ever.

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hehehe here is my system.
Sega master system overclocked to 800mhz and cooled w/ a single ice cube.

yeah i noticed that i scrolled to the bottom of the page, because i was sure it had already been closed

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Ma$e

Quote:

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Originally posted by fbs1992:
yeah i noticed that i scrolled to the bottom of the page, because i was sure it had already been closed

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Why?

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blah blah blah

I can't believe I just read it https://www.sharkyforums.com/images/...2002/02/11.gif !!

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AMD 1.4 @ 1540 on a Dragon+
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Don't get too close to my fantasy, don't be afraid to clutch the hands of your creator; stare into the lion's eyes and if you taste the candy, you'll get to the surprise...

hrmm... yeah, maybe it was a bad idea to post that here.

even though it contains factual information on the inner workings of Nuclear bombs, I found to to be quite humorous at the same time... hehe

probably should have kept it to myself... (you never know who could be eyeing these forums)

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The slave thinks he is released from bondage...
only to find a set of stronger chains.

The AUP specifically forbids SPAM. Since the topic was not computer related and didn’t present the opportunity for discussion that is what I considers it to be. I often let highly technical, non-computer related discussions go if they look like they can generate interesting, technical discussions, but that didn’t seem to be the case here

There also a second possible issue around it. It appears to be a cut and past of someone else’s article which would be a violation of the original authors copyright.


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Life is complex. It has real and imaginary parts.

actually... it wasn't an article, but an e-mail i recieved from a friend. No those are not my words, and i should have specified. But, spam?... I don't think so, yes this is the "highly technical PC forum" but this seemed like the best place to post it. None of the other forums are more closely related. While i'm on the subject,... well, you could plan the building of the H-Bomb in a 3d modeling program such as 3d studio max for visuals and MS Project for workflow...
that ties it in to PC's doesn't it...
j/k
well... kind of

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The slave thinks he is released from bondage...
only to find a set of stronger chains.

ok... i see it has been deleted now.
That is probably the best thing to do. Just trying to make a contribution

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The slave thinks he is released from bondage...
only to find a set of stronger chains.