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Quantum gravity seeks to unify quantum mechanics and general relativity to provide a complete description of the fundamental forces of the universe from "summary" of Simply Quantum Physics by DK
Quantum gravity is a field of study that aims to bring together two of the most fundamental theories in physics: quantum mechanics and general relativity. Quantum mechanics describes the behavior of particles at the smallest scales, while general relativity explains the force of gravity on large scales. By unifying these two theories, scientists hope to create a complete description of the fundamental forces that govern the universe. The need for a theory of quantum gravity arises from the fact that quantum mechanics and general relativity are fundamentally different in their approaches to understanding the universe. Quantum mechanics deals with the behavior of particles at the subatomic level, where the effects of gravity are negligible. General relativity, on the other hand, describes the force of gravity as a curvature of spacetime caused by massive objects. One of the main challenges in developing a theory of quantum gravity is the issue of scale. Quantum mechanics is incredibly successful at describing the behavior of particles at small scales, but it breaks down when applied to the force of gravity on large scales. General relativity, on the other hand, is excellent at explaining gravity on a cosmic scale, but it does not take into account the effects of quantum mechanics at the smallest scales. By unifying quantum mechanics and general relativity, scientists hope to create a theory that can describe the behavior of particles at all scales, from the smallest subatomic particles to the largest galaxies. This unified theory would provide a complete understanding of the fundamental forces of the universe and could potentially answer some of the most pressing questions in physics, such as the nature of black holes and the origin of the universe.- Quantum gravity represents a crucial area of research in modern physics, as it seeks to bridge the gap between two of the most successful theories in the field. By unifying quantum mechanics and general relativity, scientists aim to create a comprehensive description of the fundamental forces that shape the universe.
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