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RiverRich
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Just for survey.
String theory is a theoretical framework in physics that attempts to reconcile the principles of general relativity and quantum mechanics by proposing that the fundamental building blocks of the universe are tiny, vibrating strings instead of point-like particles.
String theory is important because it offers a potential solution to the long-standing problem of combining general relativity and quantum mechanics. It also has the potential to provide a unified explanation for the four fundamental forces of nature: gravity, electromagnetism, the strong nuclear force, and the weak nuclear force.
I am currently reading "String Theory: Volume 1, An Introduction to the Bosonic String" by Joseph Polchinski. This is a commonly used textbook for introductory courses on string theory.
No, string theory is still a highly debated and unproven theory. While it has shown promise in solving some problems in physics, it has yet to be experimentally verified.
In string theory, it is proposed that there are more than the usual three dimensions of space and one dimension of time that we are familiar with. These extra dimensions are thought to be curled up and compactified, making them undetectable at our current level of technology. This allows for the possibility of multiple universes existing in these extra dimensions.