Understanding the Physical Meaning of Pauli Matrices and Electron Spin

[GAGS]

1.)CAN ANYBODY TELL ME WHATS THE PHYSICAL SIGNIFICANCE AND MEANING OF PAULI MATRICES.FROM WHERE IT FOUND ITS ORIGINATION?

2.) MOREOVER WHY IS IT SAID THAT" SPIN HAS NO CLASSICAL ANALOGUE",IT IS NOT LIKE THE ANGULAR MOMENTUM OF ANY BODY SPINNING ON ITS AXIS?

3.)HOW WE CONCLUDE THAT ELECTRON'S SPIN IS +-1/2( PLEASE DONT RELATE ANSWER TO FERMIONS OR BOSONS)

WITH REGARDS

 

[malawi_glenn]

1) We had such a thread just a couple of days ago, https://www.physicsforums.com/showthread.php?t=239191

2) The elementary particles has no spatial extension, is one of the reasons.

3) Stern Garlach experiment etc.

You might want to start looking at basic web site, such as wikipedia and http://hyperphysics.phy-astr.gsu.edu/hbase/hph.html Then you can ask more specific questions :-)

 

[GAGS]

Actually sir i read the mail few days ago in:"physical significance of pauli spin matrices".but its too lenghty and tedious to understand.
Can u elaborate it in short,if being not disturbed.
Anyway for third response i am extrmely sorry,i am not getting it correctly,in stern gerlach experiment we are just separating the electron beam with opposite spin by applying magnetic field.
But sir i want to know from where we come to the result of numerical values 1/2 (or for fermions we are saying,it is half integral and for bosons we conclude integral spin)
with regards

 

[malawi_glenn]

the pauli matrices is just the spin operator for spin 1/2 particles in matrix representation. If you don't know what matrix representation of operators is, then perhaps google it a bit first.

I did the search for you regarding Q3: http://hyperphysics.phy-astr.gsu.edu/Hbase/spin.html

The spin of particles are manifested through their respons on magnetic fields, if the spin of electron was 1, the we can have three direction (-1,0 and 1) and hence 3lines in the stern gerlash experiment.

 

[GAGS]

I think I cannot get the better response to this question,thanks so much sir for clearing my confusion.