What is Gravity? How Does it Work & What Are Effects?

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Gravity is a fundamental force resulting from the curvature of spacetime caused by mass and energy, as described by General Relativity. It is not emitted from a specific point in an atom but rather arises from the entire atom or its subatomic particles. Light is indeed bent by any object with mass, although the effect is often negligible unless the mass is substantial, such as a star or black hole. A significant test of General Relativity involved observing the bending of light around the Sun during an eclipse, which made this phenomenon observable. Understanding gravity at the atomic level and its effects on light involves complex mathematics and theories.
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How does gravity work? I want to know where gravity comes from on the atom and how it attracts other matter towards it. Also the black hole gravity is so strong that not even light can escape it. Does this mean that light is being lightly bend when it passes another star/planet?
 
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Nash Su said:
Does this mean that light is being lightly bend when it passes another star/planet?

Yes.

Technically, light is bent by ANY object with mass, but of course unless the mass is large, the amount of bend is negligible.

I personally bend light all the time, but like many of my efforts, the effect is negligible.
 
Nash Su said:
How does gravity work? I want to know where gravity comes from on the atom and how it attracts other matter towards it. Also the black hole gravity is so strong that not even light can escape it. Does this mean that light is being lightly bend when it passes another star/planet?

This is a very big subject. Currently our main theory of gravitation is General Relativity. GR says that mass and energy cause a curvature of spacetime which results in objects "attracting" each other. The reason why this results in an attraction is fairly technical and involves a lot of math you most likely have never seen or heard of before. I don't even know it very well myself, so I cannot explain it.

Anything with mass or energy will gravitate, so the force isn't being "emitted" by a specific spot on an atom, but by the whole atom. (Or, if you prefer, from each subatomic particle that composes the atom)

Interestingly, one of the first tests of Einsteins Genral Theory of Relativity was to measure the change in the path of light around the Sun during an eclipse.
 
Drakkith said:
Interestingly, one of the first tests of Einsteins Genral Theory of Relativity was to measure the change in the path of light around the Sun during an eclipse.

Just to clarify a possible misunderstanding for the reader: It's not that the eclipse changed the path of the light. It would have changed anyway, but the eclipse made it observable.
 
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