Gravity is explained in general relativity as curved spacetime. Can the other forces (electromagnetic and weak/strong nuclear) also be explained by this?
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Nope. Till now, GR does not explain any other forces and conventional QFT explains all forces except GR. That's why people are trying to connect these two theories by means of String theory, Twistor theory..........etc.
Ari
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Gravity is explained in general relativity as curved spacetime. Can the other forces (electromagnetic and weak/strong nuclear) also be explained by this?
The answer is no, General Relativity describes the behavior under gravity only. The other three forces, weak , strong and electromagnetic are described by virtual exchanges between elementary particles with quantization and second quantization .
If one eliminates the "curved" part of the question, string theory and its offshoots are attempting to describe all four forces by the behavior of fundamental one dimensional strings in at least 10 dimensions, of which 9 (or more for higher dimensions) are space dimensions. Thus one can say that the effort is to explain all forces by the quantized behavior of spacetime .
anna v
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