In quantum mechanics, particles (like atoms and photons)ooze and change their states as they come into and leave contact with other particles. This makes them hard to predict and control. Classical mechanics, on the other hand, is the physics of big things like planets and baseballs, which follow well-defined paths and obey Newton’s laws.
So when is quantum mechanics wrong? It turns out that there are many situations where quantum mechanics gives different results from classical mechanics. One famous example is the double-slit experiment, in which light shines through two slits and creates an interference pattern on a screen. Classical mechanics says that each photon should go through one slit or the other, but quantum mechanics says that the photon actually goes through both slits at the same time.
Other examples where quantum mechanics and classical mechanics give different predictions include the behavior of subatomic particles, the behavior of atoms in an electric field, and the behavior of light in a strong magnetic field. In each of these cases, quantum mechanics gives a more accurate description of reality than classical mechanics.
So why do we still use classical mechanics? The answer is that, in many situations, quantum mechanics is just too difficult to use. For example, when you’re calculating the trajectory of a satellite, you don’t need to take into account the fact that the satellite is also a cloud of subatomic particles that are constantly changing their states. In this case, classical mechanics is good enough.
However, there are also many situations where quantum mechanics is the only theory that can give an accurate description of reality. For example, when you’re dealing with subatomic particles or atoms in an electric field, you need to use quantum mechanics to get the right answers.
So, in conclusion, quantum mechanics is only wrong when classical mechanics is good enough.
Other related questions:
Q: Can quantum mechanics be wrong?
A: There is no definitive answer to this question since there is currently no known way to test whether or not quantum mechanics is correct. Some physicists believe that it is possible that quantum mechanics is not correct and that there is another theory that better describes the behavior of subatomic particles. However, there is no evidence to support this claim and quantum mechanics remains the most accurate theory we have for describing the behavior of subatomic particles.
Q: What are quantum mechanics flaws?
A: Some of the key principles of quantum mechanics are at odds with our everyday experience, which can make them hard to accept.
For example, the Heisenberg uncertainty principle states that there is a limit to how precisely we can know certain properties of particles, such as their momentum. This goes against our intuition that we should be able to know everything about a particle if we measure it carefully enough.
Other strange effects of quantum mechanics include quantum entanglement, in which particles can become linked together and share properties even if they are far apart, and quantum tunneling, in which particles can tunnel through barriers that they should not be able to pass.
Critics have also argued that quantum mechanics is incomplete, as it does not explain everything about the behavior of particles. It is also difficult to test some of its predictions, as they often involve events that are too small or too brief to be observed directly.
Q: Why did Einstein not accept quantum mechanics?
A: Einstein did not fully accept quantum mechanics because it did not fit with his view of reality. He felt that the theory was incomplete and that it did not provide a complete description of the physical world.
Q: What does quantum physics contradict?
A: Quantum physics contradicts the classical physics assumption that particles (like atoms and photons) follow definite, predictable trajectories. Instead, quantum physics shows that particles behave more like waves, and their behavior is probabilistic.