[yor_on (OP)]

In one sentence each, please.
Well two then:)

[DoctorBeaver]

Spin is a quantum property of particles.

Colour charge is to gluons what EM is to photons. I think  []

[yor_on (OP)]

Ok let's throw the idea of only two sentences to the winds:)

Spin is a property of particles but can you tell me what it does?
the name suggest something 'twisting' but?
And Colour charge, why do we use colours?

[DoctorBeaver]

Colour is used in Quantum Chromodynamics. In the same way as you add red light to green light to blue light you get white (neutral) so the 3 colours of QCD add together to make neutral charge.

Spin is a bit more complex. Quantum spin has some prperties that set it apart from classical angular momentum although mathematically it is treated the same. Electron spin is the foundation of the Pauli Exclusion Principle. The quantum state of a particle is given by 4 parameters: the principal quantum number, the azimuthal quantum number, the magnetic quantum number, and the spin quantum number.

[yor_on (OP)]

Thank you DB
That was a nice description but still I want more:)
Just quoting different sources here.

---

The spin of a particle is the 'angular momentum' that the particle has when it is not moving, and in quantum mechanics, it gives the change in 'wavefunction phase' when you do certain rotations.

A. So the wavefunction phase is the magnitude (relative strength?) of the wave function?

And "a wave function phase carries no physical information, it just describe that the wave function is a wave.
the magnitude of the wave function carries information about the probability finding the particle in some points in space.
The magnitude of the wave function in a point in space is proportional to the probability of finding the particle in that point"

B. what kind of 'rotations' are we doing on a particle?

And the angular momentum of a particle about an origin is a vector quantity (speed and direction) related to rotation, equal to the mass of the particle multiplied by the 'cross product' of the 'position vector' of the particle with its 'velocity vector'.

Don't you just love that:)
1. cross product (do they mean the 'combination of')?
2. what differs the position vector from the 'velocity vector'

It may be a very precise description but it just gives me more questions:)

So do they have a real physical spin..
Or is it a mathematical quality it describes.

------------
Unlike in more complicated quantum mechanical systems, the spin of a spin-½ particle can be expressed as a linear combination of just two eigenstates, or eigenspinors.

(A eigenstate is a quantum state that is left unchanged after an observation corresponding to a particular operator ...
But as Heisenberg's uncertainty principle should come into play when observing particles?
That definition of 'eigenstates' throws me off a little too?)

These are traditionally labeled spin up and spin down. Because of this the quantum mechanical spin operators can be represented as simple 2 × 2 matrices, as opposed to the infinite dimensional matrices commonly needed to represent operators like energy or position. These matrices are called the Pauli matrices.

----

And color charge?

Ok DB:)
We use it in Quantum Chromodynamics.
But how come we find the concept of colour's a better description?
What does that say about our mathematical definitions?

[DoctorBeaver]

I'm just a dumb psychologist

[yor_on (OP)]

Nope DB, none that reads you would give you that description.

Ah, psychologist that is )

Awh...
You left that one wide open DB, don't blame me::)))

But no, you're cool.

[DoctorBeaver]

Nope DB, none that reads you would give you that description.

They don't know me well enough  []

[yor_on (OP)]

Awh I really have to stop editing my answers.

Mine is a slooow mind, only working bit wise:)

[DoctorBeaver]

Mine is a slooow mind, only working bit wise:)

Obviously. You don't seem to have realised yet that you're trying to discuss quantum physics with a beaver!  []

[yor_on (OP)]

Eh?

[yor_on (OP)]

Was that an insult??

Nah, that would go against your grain my dear Beaver.
I'm sure I've heard about you in some book

Ah yes, now I remember:)
The Wind in the Willows right!!!

I've always loved that one:)

So that must be a compliment?
I insist:)

Or was it a friend??
Nah, it was most definitely a book.

[DoctorBeaver]

Me ->

[yor_on (OP)]

Jesus weeps.
Are you an attack beaver...

Those are known to be a most dangerous species.
How will I ever be able to go to sleep knowing that you live in my laptop?
Are you reproducing?

[DoctorBeaver]

I'm a friendly little critter  []

[yor_on (OP)]

Ok, I'll take your word for it.
But I warn you, the least trouble and your whole habitat will be gone...

Directly to the scrapyard, ya'hear.
Ugh, white man has spoken...

[DoctorBeaver]

Be careful who you threaten. I have lots of relatives in the north of your country!  [!]

[yor_on (OP)]

Awh, A conspiracy is it?
Starting in My LapTop is it!!!

Look here Mr King Beaver.
I've always been especcially nice to beavers.

And I will never ever turn your habitat off.

---
Thinking again.

Seems like we took a slight detour here?
But my questions remains.

No, not those.
What is spin and color charge?

[DoctorBeaver]

Threads here have a habit of wandering off the subject  []

[yor_on (OP)]

No, I can't say that I agree.

As I see it you have given me new, valuable, and possibly dangerous information about what happens inside my laptop.
I just hope that your little friends don't brand you as a traitor because of this.

But if so, I want you to know that we do have some protected environments in the north of Sweden called Sarek, where beavers still live a life of beauty and freedom in the wild.

Possibly they are happy too?

Without hot shower's?
Nah:)

---

Any which way:)

What is colour and does it spin?
Or something to that matter.