advanced_notions:relational_physics
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advanced_notions:relational_physics [2018/03/08 17:24] jakobadmin [Student] |
advanced_notions:relational_physics [2018/03/15 13:56] (current) jakobadmin [Why is it interesting?] |
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| It is usually stated that the fundamental insight of general relativity is that there is no gravitational field at all. The gravitational force is rather an illusion due to the curvature of spacetime. | It is usually stated that the fundamental insight of general relativity is that there is no gravitational field at all. The gravitational force is rather an illusion due to the curvature of spacetime. | ||
| - | However, we can also make a completely contrary argument, which is what Einstein realised after several decades. Instead of the statement above, we can take as the fundamental insight of general relativity that there is no spacetime, only the gravitational field! This line of thought is described nicely in the book "[[http://www.cpt.univ-mrs.fr/~rovelli/book.pdf|Quantum Gravity]]" by Rovelli and is based on the "hole argument". | + | However, we can also make a completely contrary argument, which is what Einstein realised after several decades. Instead of the statement above, we can take as the fundamental insight of general relativity that there is no spacetime, only the gravitational field! This line of thought is described nicely in the book "[[http://www.cpt.univ-mrs.fr/~rovelli/book.pdf|Quantum Gravity]]" by Rovelli and is based on the "hole argument". Se also [[http://jakobschwichtenberg.com/the-true-magic-hidden-inside-general-relativity/|this essay]]. |
| Similar statements can be made for other theories, like gauge theories. This is discussed, for example, in the section "Towards a Pointless Theory" in the book "Some elementary gauge theory concepts". | Similar statements can be made for other theories, like gauge theories. This is discussed, for example, in the section "Towards a Pointless Theory" in the book "Some elementary gauge theory concepts". | ||
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