The revolution brought by quantum mechanics from "summary" of The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory by Brian Greene
Quantum mechanics, the theory that governs the realm of the very small, has ushered in a revolution in our understanding of the universe. At the heart of this revolution lies the concept of uncertainty, a fundamental principle that challenges our classical intuitions about the predictability of physical systems. In the quantum world, particles do not have definite positions or velocities; instead, they exist in a state of superposition, where they can be in multiple states simultaneously. This bizarre feature of quantum mechanics, famously illustrated by Schrödinger's cat, has profound implications for our understanding of reality. It suggests that the act of observation itself plays a crucial role in determining the outcome of an experiment, blurring the line between the observer and the observed. This unsettling idea has led some to question the very nature of physical reality, proposing alternative interpretations of quantum mechanics that challenge our traditional notions of cause and effect. Despite its counterintuitive nature, quantum mechanics has been remarkably successful in predicting the behavior of particles at the subatomic level. Its mathematical framework, developed ...
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