Quantum physics vs classical physics

In summary, classical physics is not applicable to quantum level particles because it fails to properly describe their behavior. Attempting to use classical physics on quantum objects results in incorrect answers and inability to explain fundamental phenomena such as the double-slit experiment, photoelectric effect, and stability of atoms. This ultimately led to the development of quantum mechanics as a replacement for classical physics in explaining the behavior of quantum particles.
  • #1
Dammes
15
0
what i want to know is why classical physics does not work on quantum level particles?
what are the consequences of using classical physics on quantum level particles?
 
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  • #2
Dammes said:
what are the consequences of using classical physics on quantum level particles?

You get the wrong answers, for one. The reason quantum physics was developed was to properly describe the behavior of fundamental particles because the classical ideas failed. For example, the classical electron should fall into the nucleus and emit light as it does. That doesn't happen. They tried to fix the theory but nothing worked. So QM replaced it almost immediately (within a few years) upon its discovery.
 
  • #3
There are problems with classical physics applied to quantum objects; you can't explain
- the double-slit experiment using classical mechanics of point particles
- the photoelectric effect using classical electromagnetism
- the blackbody radiation using classical electromagnetism
- the stability of atoms using classical mechanics + electromagnetism
- the spectrum of more complex atoms (the Bohr model only works for hydrogen-like atoms)
- ...
 

What is the difference between quantum physics and classical physics?

Quantum physics is the branch of physics that studies the behavior of matter and energy on a microscopic scale, while classical physics deals with the behavior of matter and energy on a macroscopic scale. Quantum physics takes into account the principles of quantum mechanics, such as wave-particle duality and uncertainty, which do not apply to classical physics.

Why is quantum physics considered to be more accurate than classical physics?

Quantum physics is considered to be more accurate because it can explain phenomena that cannot be explained by classical physics, such as the behavior of subatomic particles. Quantum physics also provides a more precise understanding of the fundamental laws of nature and has been extensively tested and verified through experiments.

How does quantum physics challenge our understanding of reality?

Quantum physics challenges our understanding of reality because it introduces concepts such as superposition and entanglement, which suggest that particles can exist in multiple states simultaneously and can be connected over large distances. These ideas are difficult to reconcile with our everyday experience and our classical understanding of the world.

Can classical physics and quantum physics be unified?

There have been attempts to unify classical physics and quantum physics, such as through the development of quantum field theory, which combines elements of both. However, a complete and satisfactory unification of the two theories has yet to be achieved and is still an active area of research in physics.

How has quantum physics impacted technology and everyday life?

Quantum physics has had a significant impact on technology, particularly in the fields of electronics, computing, and telecommunications. Many modern technologies, such as transistors, lasers, and computer memory, rely on the principles of quantum mechanics. In our everyday lives, we also encounter quantum phenomena, such as in the functioning of GPS devices and LED lights.

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