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HumanAxiom
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From another post that was not directly about what warps in the space-time fabric do to space and time. So I had figure to make another post to keep things more in order then having the initial subject change direction instead of keep its original intention.But in the discussion in what the warps are someone had talked about what they do.
and from the user CJames he had explained how time can be seen as slower or faster depending on where the gravitation pull was coming from.
from what i gathered there is redshift and blueshift
redshift being where what you see is delayed, for gravity (pulling it back) is making the light coming from a object to move slower when trying to reach the observer's eye.
Blueshift is the just the opposite, light from a object seem to be faster when reaching the observer's eye because gravity is pulling it to the observer.
Is this correct? If so it only states, time seems to change but doesn't truly change just the light coming from what's being view is delayed or accelerated making it SEEM slower or faster, but if correct can the definitions be expanded upon, so i could have a better understanding of the terms.
But how is space change or warped?
The user CJames explained it like this:
"Now normally, if you draw one line, and then you draw two lines perpendicular to that line, you have two parallel lines. That's what happens in flat space. But what if I draw a line from the center of Earth into outer space? And then what if i fire two laser beams perpendicular to that line? They will appear to curve toward the earth, due to the equivalence principle. But since the gravitational acceleration is stronger closer to the earth, the beam of light will bend more if it closer to the earth. As a result, even though both lines are perpendicular to the first one, they are NOT parallel lines! They are moving away from one another. This is not possible on a flat piece of paper. It is only possible in curved space. So space is warped."
I understand what he is saying, but i don't see how this is warping space
its bending the light not bending space.
But he also adds:
"Here is another way of looking at it. Like I said, the equivalence principle states that the force of gravity is actually an imaginary force, the same force we feel in an accelerating car. Therefore, while you sit in your chair, you are not actually sitting still. You are accelerating away from the center of the Earth at 9.8 meters per second per second. And objects that are in free fall do not feel the force of gravity, they are weightless. So objects that are in free fall are not accelerating toward the surface of the earth. The surface of the Earth is actually accelerating toward objects that are in free fall! And yet it is quite clear that the Earth is not expanding. If the surface of the Earth is not expanding, and yet it is accelerating away from the center of the earth, the only possible explanation is that time and space are warped in such a way that everything remains "at rest."
I don't quite understand this. He is explaining gravity in terms of acceleration? And we are all being accelerated, that's equal to 1G, and the way we see it, it seems all at rest? How does this explain space being warped? Could you help clarify.
and from the user CJames he had explained how time can be seen as slower or faster depending on where the gravitation pull was coming from.
from what i gathered there is redshift and blueshift
redshift being where what you see is delayed, for gravity (pulling it back) is making the light coming from a object to move slower when trying to reach the observer's eye.
Blueshift is the just the opposite, light from a object seem to be faster when reaching the observer's eye because gravity is pulling it to the observer.
Is this correct? If so it only states, time seems to change but doesn't truly change just the light coming from what's being view is delayed or accelerated making it SEEM slower or faster, but if correct can the definitions be expanded upon, so i could have a better understanding of the terms.
But how is space change or warped?
The user CJames explained it like this:
"Now normally, if you draw one line, and then you draw two lines perpendicular to that line, you have two parallel lines. That's what happens in flat space. But what if I draw a line from the center of Earth into outer space? And then what if i fire two laser beams perpendicular to that line? They will appear to curve toward the earth, due to the equivalence principle. But since the gravitational acceleration is stronger closer to the earth, the beam of light will bend more if it closer to the earth. As a result, even though both lines are perpendicular to the first one, they are NOT parallel lines! They are moving away from one another. This is not possible on a flat piece of paper. It is only possible in curved space. So space is warped."
I understand what he is saying, but i don't see how this is warping space
its bending the light not bending space.
But he also adds:
"Here is another way of looking at it. Like I said, the equivalence principle states that the force of gravity is actually an imaginary force, the same force we feel in an accelerating car. Therefore, while you sit in your chair, you are not actually sitting still. You are accelerating away from the center of the Earth at 9.8 meters per second per second. And objects that are in free fall do not feel the force of gravity, they are weightless. So objects that are in free fall are not accelerating toward the surface of the earth. The surface of the Earth is actually accelerating toward objects that are in free fall! And yet it is quite clear that the Earth is not expanding. If the surface of the Earth is not expanding, and yet it is accelerating away from the center of the earth, the only possible explanation is that time and space are warped in such a way that everything remains "at rest."
I don't quite understand this. He is explaining gravity in terms of acceleration? And we are all being accelerated, that's equal to 1G, and the way we see it, it seems all at rest? How does this explain space being warped? Could you help clarify.
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