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John Mcrain
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It this correct explanation why quantum is not valid for large object?
Why would small object want to hide their information?
Why would small object want to hide their information?
How?Dale said:It is valid for large objects.
It accurately predicts the results of experimental measurements. That is what it means for a theory to be valid.John Mcrain said:How?
No, since the conclusion is wrong.John Mcrain said:It this correct explanation why quantum is not valid for large object?
A. Neumaier said:No, since the conclusion is wrong.
For example, large superconductors can be explained only by quantum mechanics, not by classical mechanics.
AndreasC said:It is completely valid. It's just that in large objects, there is often a kind of "averaging" effect taking place that results in the (much more complicated) QM solution giving more or less the same thing as good old classical mechanics. So you could in principle just use quantum mechanics to predict the course of a ball that is thrown into the sky, but that would be much more complicated for basically no reason and it would give you more or less the same result as just doing the simple classical calculation. It is similar to how you don't use special relativity for the same problem. It's valid, it's just pointless.
Of course, this is not the case for other problems, in many cases effects specific to quantum mechanics are important for the examination of large objects.
This is precisely why such videos are not considered professional scientific sources. They are not subject to the same review and publication standards as the professional scientific literature.John Mcrain said:Men In the video has engineering and phsysics degree, so why he post wrong theory or this video is made for kids?
Yes, modern QM, also called quantum field theory, is built on special relativity.John Mcrain said:Is Einstein relativity works/exist in quntum mechanics ?
Maybe we shoudl learn more conventional phsyics before complaining that its wrong.John Mcrain said:Maybe we must have more theories for more cases..
Which explanation of these two is corrrect?Dale said:This is precisely why such videos are not considered professional scientific sources.
Man from my video say that electron will crash into nucleus using classic physics, so he conclude it cant be used for micro world..Vanadium 50 said:Maybe we shoudl learn more conventional phsyics before complaining that its wrong.
This one: https://theoreticalminimum.com/courses/quantum-mechanics/2012/winterJohn Mcrain said:Which explanation of these two is corrrect?
Until new theory comes out and prove this one wrong.Dale said:
Yes, maybe it is better to wait until then. In the meantime (after a very brief discussion among the mentors) this thread will remain closed.John Mcrain said:Maybe is better to wait 200,300
Quantum mechanics is a theory that explains the behavior of particles at the subatomic level. It is based on the principles of uncertainty and superposition, which do not apply to larger objects. As objects increase in size, their behavior becomes more predictable and classical mechanics becomes a more accurate description.
There is no specific size limit for an object to be considered "large" in quantum mechanics. However, as a general rule, objects with a mass greater than 10^-9 kilograms or a size larger than 10^-18 meters are considered to be in the classical realm and are not subject to the principles of quantum mechanics.
While quantum mechanics is primarily used to describe the behavior of particles at the subatomic level, it can also be applied to macroscopic objects under certain conditions. These conditions include extreme temperatures, pressures, or magnetic fields, where the classical behavior of the object breaks down and quantum effects become more apparent.
Quantum mechanics and classical mechanics are two different theories used to explain the behavior of matter. Classical mechanics is based on the laws of motion and gravity, while quantum mechanics is based on the principles of uncertainty and superposition. Additionally, classical mechanics is deterministic, meaning that the future behavior of a system can be predicted with certainty, while quantum mechanics is probabilistic, allowing for multiple possible outcomes.
The fact that quantum mechanics is not valid for large objects has important implications for our understanding of the universe. It means that there are different rules at play at the subatomic level compared to the macroscopic level. This also raises questions about the fundamental nature of reality and the limitations of our current scientific theories.