Energy and matter are interchangeable according to Einstein's theory of relativity from "summary" of Reality Is Not What It Seems by Carlo Rovelli
According to Einstein's theory of relativity, the relationship between energy and matter is one of the most profound insights in physics. This theory revolutionized our understanding of the universe by revealing that energy and matter are interchangeable. This idea is encapsulated in Einstein's famous equation, E=mc², which states that energy (E) is equal to mass (m) times the speed of light (c) squared. In simpler terms, this equation shows us that mass can be converted into energy, and vice versa. This concept was a radical departure from classical physics, where energy and matter were considered separate entities. Einstein's theory showed that they are two sides of the same coin, with mass being a form of energy and energy being a potential source of mass. This insight has had profound implications for our understanding of the universe. It explains how stars shine, how nuclear reactors work, and even how particles are created and destroyed in high-energy collisions. The idea that matter can be converted into energy has also led to the development of nuclear power and nuclear weapons, both of which exploit this fundamental principle of the universe. Einstein's theory of relativity has transformed our understanding of the cosmos by revealing the deep connection between energy and matter. This concept has not only revolutionized physics but has also had a lasting impact on technology and society. The interchangeability of energy and matter is a fundamental principle that underlies much of modern science and technology.
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