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Christian Grey
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How to find gravity of an object, like mirror,glass,tree,house etc using general relativity? Because every object exerts gravity.
Christian Grey said:How to find gravity of an object
"Gravity" is a curvature of space-time. It isn't "exerted". I think you mean gravitational force.Christian Grey said:Like Earth exerts a gravity on an object, objects like glass,mirror,tree etc should also exert gravity on other objects.
As light is bent by the gravitation of the sun, If I am in a room, there are different objects,can path of light also be effected by those objects like that are common in everyday life, like trees, houses etc.russ_watters said:"Gravity" is a curvature of space-time. It isn't "exerted". I think you mean gravitational force.
If the objects are stationary with respect to each other, you can use this equation:
Not exactly: light follows a straight path in space that is curved, which makes it appear to us to curve.Christian Grey said:As light is bent by the gravitation of the sun...
Technically yes, but for small objects that are nearby, the effect would be far too small to be measurable. It's barely measurable for the sun!If I am in a room, there are different objects,can path of light also be effected by those objects like that are common in everyday life, like trees, houses etc.
russ_watters said:Not exactly: light follows a straight path in space that is curved, which makes it appear to us to curve.
Technically yes, but for small objects that are nearby, the effect would be far too small to be measurable. It's barely measurable for the sun!
Specify the distribution of stress-energy for the object, then solve the Einstein Field Equations:Christian Grey said:How to find gravity of an object, like mirror,glass,tree,house etc using general relativity?
No, for the reason I gave.Christian Grey said:So can it be said that refraction(bending of light) of light through a glass, water etc is due to gravitation of glass,water?
Christian Grey said:can it be said that refraction(bending of light) of light through a glass, water etc is due to gravitation of glass,water?
Christian Grey said:every object exerts gravity.
*Ahem*: https://en.wikipedia.org/wiki/Cavendish_experimentPeterDonis said:Ordinary objects like mirrors, trees, houses, etc. have much, much, much too little mass to produce measurable spacetime curvature.
Orodruin said:Those spheres where order 100 kg and clearly produced measurable spacetime curvature.
Christian Grey said:How to find gravity of an object, like mirror,glass,tree,house etc using general relativity? Because every object exerts gravity.
According to general relativity, gravity is not a force between masses, but rather a curvature of space and time caused by the presence of mass and energy. This curvature is what we experience as the force of gravity.
The equation for calculating gravity using general relativity is known as the Einstein field equations. It is a set of 10 nonlinear partial differential equations that describe the relationship between the curvature of space-time and the distribution of matter and energy.
Newton's theory of gravity is based on the concept of gravitational force between masses, while general relativity explains gravity as a curvature of space and time. Additionally, general relativity takes into account the effects of acceleration and energy on the curvature of space-time, while Newton's theory does not.
Yes, general relativity has been successful in predicting and explaining the movements of celestial bodies, such as planets, stars, and galaxies. It has been tested and confirmed by numerous observations and experiments, including the precession of Mercury's orbit and the bending of light by massive objects.
General relativity has been extensively tested and verified through various methods, including astronomical observations, laboratory experiments, and technological applications such as GPS. Some current areas of research involve testing the theory in extreme conditions, such as near black holes, to further validate its predictions.