What is spin in subatomic particles

In summary, the conversation discusses the concept of spin and its relevance to particles in physics. The person is looking for a clear explanation of what spin is, and the other person suggests reading previous threads on the topic to gain a better understanding.
  • #1
h1010134
11
0
E.g. electrons. From other posts and Wikipedia, it apparently isn't the speed at which the particles rotate, so what the heck is it?
 
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  • #2
There have been numerous threads here, some of them probably even on-going. So read those posts and ask questions there. A new thread is no longer necessary.
 
  • #3
I have read them. Topics and subsequent replies deal with what particles have what spin, and why they have that particular spin value. None of them actually asks the question : what is spin.
 
  • #4
You already posted on another thread. I'll post there.
 
  • #5
h1010134 said:
I have read them. Topics and subsequent replies deal with what particles have what spin, and why they have that particular spin value. None of them actually asks the question : what is spin.

Here are a few that (especially if you follow the links in them) come close. If you've read them, you may be able to form a question that will get a more satisfying answer.
https://www.physicsforums.com/showthread.php?t=630057&highlight=spin
https://www.physicsforums.com/showthread.php?t=629181&highlight=spin
https://www.physicsforums.com/showthread.php?t=615516&highlight=spin
 
  • #6
Okay... thanks for the links. Will read them.
 

1. What is spin in subatomic particles?

Spin is a fundamental property of subatomic particles, such as electrons and protons, that describes their intrinsic angular momentum. It is not the same as the physical spinning motion of a macroscopic object, but rather a quantum mechanical property that can have two possible values: up or down.

2. How is spin measured in subatomic particles?

Spin is measured in units of angular momentum called "spin quantum numbers". These numbers are assigned based on the particle's behavior in a magnetic field, with up spin having a positive value and down spin having a negative value. The actual measurement of spin is done through experiments using particle accelerators and other advanced technologies.

3. What is the significance of spin in subatomic particles?

Spin is a crucial aspect of subatomic particles that helps explain their behavior and interactions. It is a key factor in determining the stability, charge, and magnetic properties of particles. Without spin, many fundamental principles of physics, such as the Pauli exclusion principle, would not hold true.

4. Can spin in subatomic particles change?

Yes, spin can change through interactions with other particles or external forces. For example, when an electron is in a magnetic field, its spin can flip from up to down or vice versa. This phenomenon, known as spin-flip, is an essential part of many processes in quantum mechanics.

5. How does spin affect the overall structure of an atom?

The spin of subatomic particles, particularly electrons, plays a significant role in determining the overall structure of an atom. The Pauli exclusion principle states that no two electrons can have the same set of quantum numbers, including spin. This principle, along with the spin of electrons, dictates the arrangement of electrons in different energy levels and determines the properties of elements and their chemical behavior.

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