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chaoseverlasting
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Why do we need a quantum theory of gravity? What would it do?
Well, "where [they] must apply at the same time" is understating the problem. To claim we understand our universe, they must be applicable at the same time EVERYWHERE and EVERYWHEN. Otherwise, our understanding is fundamentally incomplete.mathman said:Where both quantum theory and general relativity must apply at the same time, they can't. Example - what goes on inside a black hole?
DaveC426913 said:Well, "where [they] must apply at the same time" is understating the problem. To claim we understand our universe, they must be applicable at the same time EVERYWHERE and EVERYWHEN. Otherwise, our understanding is fundamentally incomplete.
chaoseverlasting said:I think we'll get it. It may take a while, but I definitely think we'll get it... if we don't destroy ourselves in the process...
A quantum theory of gravity is necessary because our current theories of gravity, such as Einstein's theory of general relativity, do not work at the quantum level. At the quantum level, the laws of physics that govern the behavior of particles are different from the laws that govern larger objects. Therefore, a quantum theory of gravity is needed to better understand the behavior of particles at the smallest scale.
A quantum theory of gravity would help us better understand the fundamental nature of the universe, particularly at the smallest scales. It would also allow us to reconcile the theories of gravity and quantum mechanics, which currently have fundamental differences and cannot be unified. This would greatly advance our understanding of the universe and potentially lead to new technologies and applications.
A quantum theory of gravity would provide a more complete understanding of the fundamental forces and particles that make up the universe. It would also shed light on the nature of space and time at the smallest scales, potentially leading to a better understanding of phenomena such as black holes and the Big Bang. Additionally, it could open up new areas of research and exploration in the field of physics.
Yes, there are several ways in which a quantum theory of gravity can be tested. One approach is through experiments at high-energy particle colliders, such as the Large Hadron Collider, where scientists can study the behavior of particles at extreme energies. Another way is through observations of astrophysical phenomena, such as gravitational waves, which can provide insights into the nature of gravity at the quantum level.
While there have been many proposed theories and models for a quantum theory of gravity, it is still an ongoing area of research and no single theory has been accepted as the definitive theory. However, advancements in technology and scientific understanding have brought us closer to solving this mystery, and many scientists believe that we are on the cusp of discovering a quantum theory of gravity.