Instantaneous action of gravity

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In summary, according to Einstein's theory of special relativity, instantaneous action at a distance is not possible as it would violate the speed limit of information propagation. The speed of expansion of space can appear to be faster than light, but it is not a local speed and is not limited to anything. Changes in the curvature of space do not violate the speed limit, but so far, no FTL-propagation has been observed. When a massive object is removed, the effect will occur at the same time as the object is seen to disappear, as gravity moves at the speed of light.
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arunshanker
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Instantaneous action of gravity
According to Albert Einstein's theory of special relativity, instantaneous action at a distance was seen to violate the relativistic upper limit on speed of propagation of information. For example if a massive object was removed will the effect be instantaneous or not
If so then meaning information had been transmitted faster than the speed of light. This violates the relativistic upper limit on speed of propagation of information
Speed of expansion of space is known to be faster that light
Is it possible that changes in the curvature of space also can be faster that light
 
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For example if a massive object was removed will the effect be instantaneous or not
Probably not, but we do not know any way to remove objects from our world.

Speed of expansion of space is known to be faster that light
It depends on the coordinates you use. This is not a local speed, and it is not a speed of something in spacetime - it is not limited to anything.
Is it possible that changes in the curvature of space also can be faster that light
That is a completely different thing, and measurements did not find any FTL-propagation yet.
 
  • #3
For example if a massive object was removed will the effect be instantaneous or not

Effect will occur at the same time object is seen to disappear (gravity moves at the speed of light).
 

1. What is instantaneous action of gravity?

The instantaneous action of gravity is the concept that gravity acts instantaneously on objects, pulling them towards each other with a force that is directly proportional to their masses and inversely proportional to the square of the distance between them. This means that the gravitational force between two objects changes immediately as the objects move or the distance between them changes.

2. How does the instantaneous action of gravity differ from other forces?

Unlike other forces, such as electromagnetic or nuclear forces, the gravitational force between two objects is always attractive and acts at a distance. It also has an infinite range, meaning that any two objects in the universe are affected by the gravitational force between them.

3. What is the role of mass in the instantaneous action of gravity?

According to Newton's law of universal gravitation, the gravitational force between two objects is directly proportional to their masses. This means that the greater the mass of an object, the greater the force of gravity it exerts on other objects.

4. Is the instantaneous action of gravity affected by the speed of light?

No, the instantaneous action of gravity is not affected by the speed of light. This means that changes in the position or motion of objects will immediately affect the gravitational force between them, regardless of how far apart they are or how fast they are moving.

5. What are some real-world examples of the instantaneous action of gravity?

Some examples of the instantaneous action of gravity include the motion of planets and other celestial bodies in the solar system, the attraction between objects on Earth, and the gravitational pull between the Earth and the Moon.

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