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Josh S Thompson
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If two people are in in space ships traveling next to each other at the same speed and they are going close to the speed of light they see each other expiriencing time more slowly. Why does this happen?
I disagree. The cause of time dilation in SR is very simple and can be shown with a simple diagram.Maxila said:As to why they would see time go more slowly to an observer for which they had a relative velocity, Relativity does not offer much explanation ...
phinds said:I disagree. The cause of time dilation in SR is very simple and can be shown with a simple diagram.
Here's one of hundreds that are available on the internet. This shouldn't even need any explanation.
View attachment 87248
phinds said:The cause of time dilation in SR is very simple and can be shown with a simple diagram.
Maxila said:t doesn't offer any clues as why one sees gravitational time dilation
Maxila said:that diagram would not be applicable to a case where each observer is on the same vector
PeterDonis said:What does "on the same vector" mean?
This is the classic example of an astranaut in a space-ship shining a light perpendicular to the motion of the ship to a mirror on the floor and having it go down and come back up in a straight line. But to an observer for whom the ship is moving, the light beam is taking a "V" path, which has to be longer and since the speed of light can't be different only the time can be different, thus time dilation.PeterDonis said:This may be a little too simple. What is moving along the arrows? Are you trying to show a light clock?
Maxila said:Observer A at point 1, Observer B at point 2
Josh S Thompson said:why would time slow down if the distance between the space ships is not changing
Maxila said:Observer A at point 1, Observer B at point 2
phinds said:This is the classic example of an astranaut in a space-ship shining a light perpendicular to the motion of the ship to a mirror on the floor and having it go down and come back up in a straight line. But to an observer for whom the ship is moving, the light beam is taking a "V" path, which has to be longer and since the speed of light can't be different only the time can be different, thus time dilation.
Didn't know it by that name, but sounds reasonable.PeterDonis said:In other words, it's a light clock.
PeterDonis said:I don't see how this is relevant to what we're discussing. You can always draw an arrow between two points. So what?
DaleSpam said:I re-read it in context including the hyperphysics link. I also don't see the relevance. You can always draw a vector between two points.
Yes. The illustration only works for the situation where the relative velocity is perpendicular to the light path in the frame where the clock is at rest. Since you can always posit a clock in such an orientation the result is general even if the illustration is not.Maxila said:This was meant to illustrate to phinds, that the diagram showing a longer light path as an explanation of time dilation, is not applicable to a case where the relative velocity between observers and the light path are all on the same vector.
Maxila said:This was meant to illustrate to phinds, that the diagram showing a longer light path as an explanation of time dilation, is not applicable to a case where the relative velocity between observers and the light path are all on the same vector.
Special relativity is a theory proposed by Albert Einstein that describes how time and space are perceived differently by observers moving at different speeds. It also explains the relationship between energy, mass, and the speed of light.
In special relativity, the perception of time and space is relative to the observer's frame of reference. This means that two observers moving at different speeds will have different perceptions of time and space. In the case of two parallel space ships, each observer on the ships will experience time and space differently due to their relative speeds.
In special relativity, time is not absolute and can be perceived differently by different observers. As an object's speed increases, time slows down for that object. This is known as time dilation. Therefore, two observers moving at different speeds will experience time differently.
The twin paradox is a thought experiment that illustrates the effects of special relativity on time perception. It involves two twins, one of whom stays on Earth while the other travels in a high-speed spaceship. When the traveling twin returns, they will have aged less than their twin on Earth due to the effects of time dilation.
Yes, special relativity is observed in everyday life through various phenomena such as GPS systems, which need to account for the effects of time dilation due to the satellites moving at high speeds. Additionally, particle accelerators and nuclear reactors also demonstrate the principles of special relativity.