Why sub-classical physics and quantum physics

In summary, the conversation discusses the distinction between sub-classical and quantum physics and the reasons why they cannot be unified. Sub-classical physics, also known as classical physics, is a good approximation for understanding the behavior of macroscopic objects, but it is not suitable for studying the microscopic world of atoms and sub-atomic particles. Quantum physics, on the other hand, can accurately describe the behavior of these small particles but is too complex and time-consuming to be used for macroscopic calculations. Classical physics can be seen as a special case of quantum mechanics for larger objects, where quantum effects are negligible.
  • #1
chrisjiang
4
0
Why sub-classical physics and quantum physics, can not be unity between the two up?
 
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  • #2
What do you mean by "sub-classical"?
 
  • #3
Sorry, I am a Chinese, English is not so good. I mean about the classical physics "and" quantum physics ", why should distinguish respectively
 
  • #4
With classical physics you can't compute and examine the physics of the too small, at the level of atoms and sub-atomic particles. Classical physics is basically a very good approximation of how the macroscopic worls behaves, but when you examine the microscopic everything is so more complex and sometimes counter-intuitive. Its possible to use quantum physics to calculate macroscopic behavior, but it would imply too many calculations.
 
  • #5
Actually, classical physics are special case of quantum mechanics for big masses, big objects and trajectories. In macroscopic world quantum effects are neglectible.
 
  • #6
I see, thank you
 

1. Why do we need sub-classical physics and quantum physics?

Sub-classical physics and quantum physics are necessary because they provide a deeper understanding of the physical world at different scales. Classical physics cannot fully explain the behavior of particles at the subatomic level, while quantum physics helps explain the behavior of particles at this scale. Furthermore, sub-classical physics helps bridge the gap between classical and quantum mechanics, providing a more complete picture of the physical world.

2. How is sub-classical physics different from classical physics?

Sub-classical physics differs from classical physics in that it takes into account the behavior of particles at the subatomic level. This includes concepts such as quantum entanglement, superposition, and non-locality, which do not have equivalents in classical physics. Sub-classical physics also challenges the deterministic worldview of classical physics, introducing probability and uncertainty into the equations.

3. What are the practical applications of quantum physics?

Quantum physics has a wide range of practical applications, including quantum computing, cryptography, and communication. It also plays a crucial role in many modern technologies, such as transistors, lasers, and MRI machines. Furthermore, our understanding of quantum physics has led to the development of new materials and technologies, such as superconductors and semiconductors.

4. How does quantum physics explain the behavior of particles?

Quantum physics explains the behavior of particles through the use of mathematical equations, such as the Schrödinger equation. These equations take into account the wave-particle duality of particles and describe their behavior in terms of probabilities rather than definite outcomes. This allows us to understand phenomena such as the double-slit experiment and quantum tunneling, which cannot be explained by classical physics.

5. Is quantum physics the ultimate theory of everything?

At this point, quantum physics is considered the most comprehensive and accurate theory to explain the behavior of particles at the subatomic level. However, it is not a complete theory of everything, as it has not yet been able to fully integrate with the theory of general relativity, which explains the behavior of larger objects and the force of gravity. Scientists continue to work towards a unified theory that can explain all phenomena in the universe.

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