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11 years ago
As I understand current thinking, in quantum mechanics a force occurs through particle exchange so gravity should exhibit particle exchange.  But in relativity gravity is explained as motion along the curvature of spacetime.  Can't the dilemma be resolved by saying gravity is not a true force but just appears to be one (action at a distance) through an artifact of space curvature?
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#1
11 years ago
Well, No because it can't Not Act. Also it effects all in it's sphere action. Even in monitoring.
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#2
11 years ago
That is basically what relativity does. But how do you calculate it? The usual way is F=GMm/r^2, which considers it a force. If you have a way to calculate how fast a rock will fall when I drop it without using F=MA, where the F is calculated from GMm/r^2, then you should publish that.

Anyway, Einstein never did like quantum mechanics.
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#3
11 years ago
The fact that gravity can be understood geometrically in terms of the curvature of space-time, it doesn't follow that gravitation is not a force.  It just tells you about the nature of this particular force.
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#4
11 years ago
Gravity is considered a force in classical, Newtonian mechanics.  However, it is NOT considered a force from a general relativistic point of view.  It instead warps spacetime, and therefore affects the motion of particles - but not through a force.
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leojesse2leojesse2
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11 years ago
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#6
11 years ago
Because gravity itself causes the curvature. Gravity is not "movement along the curvature of spacetime", rather that movement describes an object moving along a gravitationally bound trajectory, like a comet or a planet.

Gravity is (very probably) also subject to quantum rules, and also uses particle exchange to mediate the force. These particles, called gravitons, are believed to exist but have not yet been confirmed experimentally.
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#7
11 years ago
Without mass, and the gravity it causes, there would be no curvature of space. An artifact is a man made thing,the term can't apply in this situation.
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