560 views

### Why do particles have spins such as $1/2$, $3/2$, $5/2$? [duplicate]

What does it mean to have 'half' spin? I have looked on Wikipedia and a few youtube videos on spin but they don't explain what it means to have $1/2$ spin. I am 18 and only starting to learning about ...
• 1,640
44 views

### About the spin of fundamental particle [closed]

What if the spin of electron or of any fundamental particle is same as ball/top spinning,is there will be any change in physics rule?
104 views

### How can a point particle have orientation? [duplicate]

I always thought that a point particle would have spherical symmetry. This is the case for the intrinsic electric field from an electron. However, the intrinsic magnetic field of an electron has ...
• 2,249
139 views

### Spin (for chemists) for 100th time here on the forum [closed]

EDIT: Okay so I see the question was bit unclear. I know about matrices as far as we have used them but we never used any group theory. Determinants like slater determinants are used in chemistry, ...
• 11
109 views

### Spin of a particle (Quantum Mechanics) [duplicate]

Why the intrinsic spin cannot be expressed in terms of polar vectors or the orbital variables $\bf r$ and $\bf p$? Or, why do we need matrix representation for Spin?
• 1,299
215 views

### Can a point spin? [closed]

Can a point spin?(the verb not the property)? Does it take up space? If so should it?
52 views

### Is the spin of an electron based on its direction of angular momentum? [duplicate]

Is the spin of an electron based on its direction of angular momentum? Is it based on the right hand rule of angular momentum? Does Spin up means that the electron is spinning anti-clockwise and spin ...
• 1,885
63 views

### How to explain spin for a 14-year old teen [duplicate]

How do you explain the concept of spin in QM to a 14-year old teen, and why it isn't a vector as in the classical notion of angular momentum?
2k views

### Does String Theory explain spin?

The state of a particle will generally change if you rotate it. The details of how the state changes under an infinitesimal rotation are contained in the angular momentum operator J. This operator can ...
1 vote
410 views

### Difference between classical spin and quantum spin [duplicate]

What is the difference between classical spin and quantum spin?
28 views

### Angular momentum in QM [duplicate]

My doubt is about the spin of particles. I am unable to imagine spin as a physical quantity. So what is spin actually?
35 views

### Is muon a point particle? [duplicate]

Im just a beginner in particle physics. As I have understand, electrons are considered as a point particle whose spin has nothing to do with original rotation around own axis but an intrinsic quantum ...
34 views

### What is actually spinning in quantum spin? [duplicate]

Some texts say quantum spin is analogous to the spin of a planet in that it gives a particle angular momentum and a magnetic moment. However, as subatomic particles are tiny, the surfaces of charged ...
• 11
64 views

### What happens when a charge spins at near- $c$? [duplicate]

I asked a similar question but it was closed with no valid reason, this question asks a surely legit question of what happens when a charge moves at $c-\epsilon$. Consider an electron that actually ...