A simple question about Quantum theory

In summary, the conversation discusses the application of quantum mechanics to larger scales in the universe and the effects of uncertainty and exclusion on these scales. It is stated that quantum mechanics is the basis of all physics and can be observed on a large scale, but its effects often average out to give classical results. The conversation also mentions that quantum effects are more visible on small scales and that certain calculations, such as electron diffraction, can be observed macroscopically. However, it is unlikely to observe quantized objects on a large scale. The conversation suggests that George Gamow's book, 'Mr Tompkins in Paperback', discusses this topic in an amusing way.
  • #1
Adrian07
84
1
Can quantum be applied to the larger scales in the universe and what would be the affect of uncertainty and exclusion.

If the answer is yes where can I get the answer to a calculation I am interested in.
 
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  • #2
Adrian07 said:
Can quantum be applied to the larger scales in the universe
depends what you mean by "quantum".
Quantum mechanics underpins all physics we know ... so it must apply to the large scale.
What usually happens is that the quantum effects average out to give the classical results.
You would not expect to see things like quantization with large units.
An example of a quantum effect visible on a large scale would be Black-Body spectrum as applied to stars.
and what would be the affect of uncertainty and exclusion.
Just what you see around you.
Pauli exclusion and Heisenberg's uncertainty are important on very small scales when you are being very precise. Large scale measurements are unlikely to be accurate enough to run foul of Heisenberg's uncertainty for example.
If the answer is yes where can I get the answer to a calculation I am interested in.
Depends on the calculation.
 
  • #3
Many quantum effects are observable macroscopically.
Electron diffraction, ditto neutron diffraction. Scanning Tunnelling microscopy, photoelectric effect.

But if you're looking for a quantised Elephant...unlikely.

George Gamow wrote an amusing book on the topic - 'Mr Tompkins in Paperback'
 

1. What is quantum theory?

Quantum theory is a branch of physics that explains the behavior of particles at a subatomic level. It describes how particles interact with each other and with energy, and it is used to understand phenomena such as energy levels, atomic structure, and the behavior of light.

2. How does quantum theory differ from classical physics?

Quantum theory differs from classical physics in that it uses probabilistic models to describe the behavior of particles. In classical physics, objects are treated as definite, measurable entities with predictable trajectories. In quantum theory, particles are described by wave functions that represent a range of possible states and behaviors.

3. What are the applications of quantum theory?

Quantum theory has a wide range of applications, including electronics, optics, cryptography, and quantum computing. It is also used in medical imaging, chemical reactions, and materials science. Many modern technologies, such as transistors and lasers, rely on principles of quantum theory.

4. What is the uncertainty principle in quantum theory?

The uncertainty principle states that it is impossible to know both the exact position and momentum of a particle at the same time. This is because the act of measuring one property of a particle affects the accuracy of the measurement of the other property. It is a fundamental principle in quantum theory and highlights the probabilistic nature of the behavior of particles at a subatomic level.

5. How has quantum theory revolutionized our understanding of the universe?

Quantum theory has revolutionized our understanding of the universe by challenging our classical, deterministic view of the world. It has led to groundbreaking discoveries in physics, such as the existence of subatomic particles, the wave-particle duality, and quantum entanglement. It has also opened up new possibilities for technology and has expanded our understanding of the fundamental laws that govern our universe.

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