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fxdung
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Almost phenomena at macro level are classical phenomena,why physics needs QM very much?Is it rational need or practical need?
fxdung said:Is it rational need or practical need?
fxdung said:I think Chemistry,Nuclear Physics have practical needs,but how about other branch?
Quantum Mechanics is necessary because it provides the most accurate description of the behavior of matter and energy on a microscopic scale. Classical physics, which describes the behavior of larger objects, fails to explain certain phenomena such as the behavior of particles at the subatomic level. Therefore, Quantum Mechanics is essential for our understanding of the fundamental workings of the universe.
Quantum Mechanics differs from classical physics in that it describes the behavior of particles in terms of probabilities rather than definite states. It also takes into account the concept of wave-particle duality, where particles can behave like waves and vice versa. Additionally, Quantum Mechanics introduces the idea of superposition, where particles can exist in multiple states simultaneously.
Quantum Mechanics has a wide range of practical applications in fields such as technology, medicine, and cryptography. For example, it is the basis for the development of transistors, lasers, and MRI machines. It also plays a crucial role in the development of quantum computers, which have the potential to revolutionize computing power.
Quantum Mechanics has fundamentally changed our understanding of the world by showing that the behavior of particles at the subatomic level is vastly different from what we observe in our everyday lives. It has also challenged our traditional notions of cause and effect, and has opened up new possibilities for technology and scientific advancement.
No, Quantum Mechanics is not a complete theory. It is still a subject of ongoing research and there are many unanswered questions and mysteries surrounding it. For example, it has not yet been reconciled with general relativity, the theory of gravity. However, it is currently the most accurate and successful theory we have for understanding the behavior of matter and energy at the subatomic level.