Chriss Posted November 13, 2013 Author Share Posted November 13, 2013 So in silver atoms there is one electron spin un in 5s shell. How they where deflected in two directions ? Link to comment Share on other sites More sharing options...
swansont Posted November 13, 2013 Share Posted November 13, 2013 So in silver atoms there is one electron spin un in 5s shell. How they where deflected in two directions ? You can have the electron in the spin up or spin down state, which will have opposite dipole values. Link to comment Share on other sites More sharing options...
Chriss Posted November 15, 2013 Author Share Posted November 15, 2013 What does the spin of the particles says like 1/2, 2/3, 5/2 ? Link to comment Share on other sites More sharing options...
swansont Posted November 15, 2013 Share Posted November 15, 2013 You can get those spin values from many-electron systems, and you can have a total angular momentum that combines spin and orbital angular momentum where you see 3/2 and 5/2 or more. Electrons by themselves always have spin 1/2, but other particles can have other values for spin. You can have spin 1 and 2 as well. But the values only change by integral amounts, so a system with half-integral angular momentum will never end up with an integral amount. Link to comment Share on other sites More sharing options...
Iwonderaboutthings Posted November 22, 2013 Share Posted November 22, 2013 Those are the two possible orientations of the electron spin. You pick an axis for measurement, and the projection along that axis will be either + or - one unit of angular momentum (Planck's constant). We call that up or down. Spin is a solely quantum-mechanical phenomenon http://en.wikipedia.org/wiki/Spin_(physics) If this is truly the case, " could " this mean that the h constant has a double? an anti per say? In this model : http://hyperphysics.phy-astr.gsu.edu/hbase/spin.html it shows the formula with h similar as up or down. I think what confuses many about this is that h = 1 and -1 simultaneously or proportionally sound. That could mean the h constant is a squared number somehow. I assume this is why the wave function focuses on the electron and nothing else. In this video however, it shows how the h constant is related to chemical interactions of the periodic table: http://www.youtube.com/watch?v=A6DiVspoZ1E But as with the later mentioned if this is such the case, then h must have an anti association. Link to comment Share on other sites More sharing options...
swansont Posted November 22, 2013 Share Posted November 22, 2013 h is defined to be a positive number; it's a magnitude. If the angular momentum is negative, it's from the spin value, e.g. being -1/2 instead of 1/2 Link to comment Share on other sites More sharing options...
Iwonderaboutthings Posted November 23, 2013 Share Posted November 23, 2013 (edited) h is defined to be a positive number; it's a magnitude. If the angular momentum is negative, it's from the spin value, e.g. being -1/2 instead of 1/2 Crazy question then: 6.62606957(29)×10−34is a positive number???? Planck constant http://en.wikipedia.org/wiki/Planck_constant If h is a magnitude I assume its linear, such as a radian? Otherwise how else could the quantum of action " evolve" in relation to " electron spin orbitals"? h bar?? but that involves another fundamental constant as pi ratio, which is also used to measure: volumes, circumferences, gas prices and etc. Seems pi ratio is virtual involving spin. h is a positive number, Hymm, If this is not the case, then can their ever be something as, traveling back in time?? If the h constant is the quanta of action, then I believe so. But then their is the issues of the suspected " graviton sir" Graviton http://en.wikipedia.org/wiki/Graviton With all its interactions with the quantum world, I assume the electron spin orbitals and shells also connect to the " evolution" of time. Edited November 23, 2013 by Iwonderaboutthings Link to comment Share on other sites More sharing options...
Chriss Posted November 23, 2013 Author Share Posted November 23, 2013 What is the relation between the spin of the particles and magnetic dipole moment ? Link to comment Share on other sites More sharing options...
swansont Posted November 23, 2013 Share Posted November 23, 2013 Crazy question then: 6.62606957(29) ×10−34is a positive number???? Planck constant http://en.wikipedia.org/wiki/Planck_constant Yes. The negative sign in the exponent means that it is a number less than 1. e.g. 6 x 10-1 = 0.6 6 x 10-2 = 0.06 There are 33 zeros after the decimal place before you would write the "6". h is a very small number. What is the relation between the spin of the particles and magnetic dipole moment ? http://en.wikipedia.org/wiki/Electron_magnetic_dipole_moment Link to comment Share on other sites More sharing options...
Chriss Posted November 23, 2013 Author Share Posted November 23, 2013 Is there a relation between the spin of the particles and the magnitude of their magnetic moment ? Link to comment Share on other sites More sharing options...
swansont Posted November 23, 2013 Share Posted November 23, 2013 Is there a relation between the spin of the particles and the magnitude of their magnetic moment ? Yes. Read the link I provided in my last post for the electron. You can Google for other particles as well; protons and neutrons are more complicated because they are composite particles. Link to comment Share on other sites More sharing options...
Iwonderaboutthings Posted November 24, 2013 Share Posted November 24, 2013 (edited) Yes. The negative sign in the exponent means that it is a number less than 1. e.g. 6 x 10-1 = 0.6 6 x 10-2 = 0.06 There are 33 zeros after the decimal place before you would write the "6". h is a very small number. http://en.wikipedia.org/wiki/Electron_magnetic_dipole_moment You stated that h is a positive number? " h is defined to be a positive number" --->your words.. Why does the exponent matter? I thought this was not the case... Edited November 24, 2013 by Iwonderaboutthings Link to comment Share on other sites More sharing options...
swansont Posted November 24, 2013 Share Posted November 24, 2013 You stated that h is a positive number? " h is defined to be a positive number" --->your words.. Why does the exponent matter? I thought this was not the case... Yes, it's a positive number. The exponent in this notation only tells you how big the number is. Link to comment Share on other sites More sharing options...
Iwonderaboutthings Posted November 24, 2013 Share Posted November 24, 2013 Yes, it's a positive number. The exponent in this notation only tells you how big the number is. EUREKA! This now makes better sense! tHANKS! So that the exponent works much like translation? HOW ON EARTH DOES SCIENCE MEASURE SOMETHING SOOOOOOO SMALL???? Link to comment Share on other sites More sharing options...
imatfaal Posted November 25, 2013 Share Posted November 25, 2013 EUREKA! This now makes better sense! tHANKS! So that the exponent works much like translation? HOW ON EARTH DOES SCIENCE MEASURE SOMETHING SOOOOOOO SMALL???? http://iopscience.iop.org/0034-4885/76/1/016101/pdf/0034-4885_76_1_016101.pdf IOP PUBLISHING REPORTS ON PROGRESS IN PHYSICS Rep. Prog. Phys. 76 Richard Steiner History and progress on accurate measurements of the Planck constant Link to comment Share on other sites More sharing options...
Enthalpy Posted November 26, 2013 Share Posted November 26, 2013 Why, "small"? h is what determines the size of an atom. We observe atoms that constitute a surface by sensing them with the last atom at the tip of a needle, at an atomic force microscope, or a tunnel microscope. The needle is moved mechanically, for instance by a piezoelectric actuator. Link to comment Share on other sites More sharing options...
Chriss Posted March 11, 2014 Author Share Posted March 11, 2014 Does the spin value changes in excited atoms ? Link to comment Share on other sites More sharing options...
swansont Posted March 11, 2014 Share Posted March 11, 2014 The overal spin can change, because the spins add. Two spin ½ particles can give you a spin 0 particle or a spin 1 particle. When you excite an atom, the spin can flip. Some excitations only involve a spin flip. Link to comment Share on other sites More sharing options...
MirceaKitsune Posted April 2, 2014 Share Posted April 2, 2014 There's actually one thing I've been trying to understand here: Do particles (such as electrons) really spin? As in, do the "surface" of the particle or the quarks inside it actually rotate if you give the particle an anagular velocity, or should particles be imagined as something that no rotation can be attributed to and can only be represented by a position in space (in other words as nothing but points mathematically)? Link to comment Share on other sites More sharing options...
ajb Posted April 2, 2014 Share Posted April 2, 2014 Do particles (such as electrons) really spin? The intrinsic spin is not related to the particle spinning about some axes. You need special relativity to understand spin, where it does appear a bit more like a rotation. However, in non-relativistic mechanics spin is just "bolted on to" the theory for phenomenological reasons. Link to comment Share on other sites More sharing options...
Chriss Posted April 16, 2014 Author Share Posted April 16, 2014 What electron-spin coupling is ? Link to comment Share on other sites More sharing options...
swansont Posted April 16, 2014 Share Posted April 16, 2014 What electron-spin coupling is ? Do you mean spin-orbit coupling? https://en.wikipedia.org/wiki/Spin–orbit_interaction http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/hydfin.html Link to comment Share on other sites More sharing options...
Chriss Posted January 1, 2015 Author Share Posted January 1, 2015 How two electrons become entangled ? Link to comment Share on other sites More sharing options...
swansont Posted January 1, 2015 Share Posted January 1, 2015 How two electrons become entangled ? Generally, when they interact such that the net property (e.g. spin) is known, but the particles can't be distinguished. Link to comment Share on other sites More sharing options...
Chriss Posted February 6, 2015 Author Share Posted February 6, 2015 What does the spin like 1/2 1 etc stand for ? of what ? Link to comment Share on other sites More sharing options...
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