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The infinite weirdness of black holes makes it difficult for a physicist to combine gravity with quantum mechanics (QM).
The fact that gravity works on everything makes it difficult to construct an apparatus to measure the QM properties of gravity. This is because the measuring apparatus can itself collapse into a black hole if it is heavy, and would not be able to measure accurately if it is too light.
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Any proposed theory of quantum gravity would need to take care of the principles of locality, which state that any variable can change independently while measuring the properties of any point in space-time. These variables are called the degrees of freedom.
A...
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The ‘curves in space’ theory of gravity is falling out of favour due to the fact that Einstein’s equations seem to work on our solar system but begin to break when we apply the same near a black hole or back in time, during the initial big bang.
String Theory, which conce...
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According to physicists, quantum particles are responsible for three forces of nature:
The fourth force of nature, gravity, is till now assumed to not originate from quantum par...
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Einstein's General Theory Of Relativity provides a rock-solid description of gravity, black holes and even the Big Bang, but fails to explain the very ‘singularities’ that signal towards infinity.
The extraordinary force of gravity can be researched with new-age engineering experiments bu...
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The reason Einstein’s theory of general relativity works well in lower energy calculations and standard quantum techniques but not in higher energies and scales (like a black hole), could be because certain key features or ingredients of gravity are yet unknown to us, and are therefore missing fr...
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"The number of degrees of freedom in a spatial region is proportional to its surface area instead of its volume” - Daniel Harlow, Quantum gravity theorist at MIT.
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Quantum gravity experiments and observations show some interesting phenomena in particles and even space-time. It is the cause of the creation of entire universes, not just particles.
The more the universe expands, the more vacuum is created, due to the expansion of space-time, leading to ...
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A black hole is, like the name itself, a point of singularity and infinite density, which remains invisible, much like the event horizon, which is the surface.
A black hole, from a distance, carries the same properties of mass and gravity like a star would...
A black hole is a region where gravity is so strong that light cannot escape itself.
A black hole has a boundary called the event horizon. It is where gravity is just strong enough to track light back and prevent it from escaping. Because nothing can travel faster than ligh...
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