Twin Paradox Theory: Explained for 9th Graders

[regaldeath]

I know there are a few threds already on this subject, but it seems to me that all of them require preknowlage on the subject busides a wikipedia search which only seems to tell you that If one twin leave Earth vie. space ship, and travels .99c to a Galaxy 2 light years away, turns around, and comes back to earth, around 4 years will have gone by for that person. But because he was moving at the speed of light, time affected him differently, and back on earth, 13 years have gone by.
Time is relative to speed, the faster you are going, the slower time is, the slower you are going, the faster time affects you. Speed is times medium, just like mass and tempter is sound and light’s medium.
It would not be possible thought to change your ‘internal clock’ by driving 90 mph down a highway, because compared to the speed of light 90 mph is really quite insignificant.
Or atlest that's what i got out of it.

basicly what i want to know, and don't get, is WHY this happens, like what specifically is Earths time speed compaird to the speed of light? -wich seems to me would solve the question, though I am not totally sure.

What happens to Distance at near the speed of light, because there is an object in space going the speed of light, wouldn't it creat a 'curve' space? this might not seems so relevent, but if your going at the speed of light, wouldn't distance become not so relevent, or somthing like that...I don't really know anymore, I've staired at the problem for so long .

And i would also like to understand the effects of traveling near c on mass.
would it become extreamly dence, or impload? uhh.

Well if someone would be willing to explain this to me as soon as posible, in the simplest turms posible, I'm only in 9th grade, so i don't have much - if any deep understading of physics.

-Thanks.

 

[mathman]

basicly what i want to know, and don't get, is WHY this happens, like what specifically is Earths time speed compaird to the speed of light? -wich seems to me would solve the question, though I am not totally sure.

Since speed is relative, you can't make the comparison you are talking about.

What happens to Distance at near the speed of light, because there is an object in space going the speed of light, wouldn't it creat a 'curve' space? this might not seems so relevent, but if your going at the speed of light, wouldn't distance become not so relevent, or somthing like that...I don't really know anymore, I've staired at the problem for so long .

Distance along the direction you are going appears shorter in comparison to something not moving relative to the object you are looking at.

And i would also like to understand the effects of traveling near c on mass. would it become extreamly dence, or impload? uhh.

To the outside observer mass would increase. The moving object does not sense any mass increase.

 

[vivesdn]

If c is a universal constant for everybody and everywere, then two people traveling at different speeds would measure the speed of light to be c. But as one of them travels quicker than the other, time must be slower if he has to determine the same value for c.

What it is not known is why c is constant. It is just a theory that has been proven in a number of experiments. One of them: two atomic clocks have been traveling in oposite directions aboard Earth satellites. After some time, these clocks have shifted slightly as the relativity theory predicts, while total speed was high but far from c.

A corollary: time on Earth is different from time on faster or slower planets, as each planet is traveling at different speed through space.

 

[Claude Bile]

I know there are a few threds already on this subject, but it seems to me that all of them require preknowlage on the subject busides a wikipedia search which only seems to tell you that If one twin leave Earth vie. space ship, and travels .99c to a Galaxy 2 light years away, turns around, and comes back to earth, around 4 years will have gone by for that person. But because he was moving at the speed of light, time affected him differently, and back on earth, 13 years have gone by.

The twins paradox is not really a paradox once you take the effect of acceleration into account.

Time is relative to speed, the faster you are going, the slower time is, the slower you are going, the faster time affects you.

Note that from your frame of reference time would not appear to slow down. It would only appear to slow down to other observers' frames of reference.

It would not be possible thought to change your ‘internal clock’ by driving 90 mph down a highway, because compared to the speed of light 90 mph is really quite insignificant.
Or atlest that's what i got out of it.

It wouldn't be possible because you will always be stationary in your reference frame, not because the speed you are traveling at is small compared to c.

Claude.