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^Dale, thank you for your answer, I wasn't confused by it until I remembered that I thought you said before I can't actually rotate the magnetic moment vector of the electron to a desired vector...If you rotate your two electron apparatus you will get the same behavior. Therefore spacetime is isotropic.

metastable said:Is there a method that will cause the vector of the electron's magnetic moment to stop precessing & continuously point in a desired direction? Suppose I observe a distant galaxy and I want each measurement I perform of the electron's magnetic moment vector to show that it is substantially parallel with the vector pointing towards that galaxy from my present position within some small margin of error. What forces and methods would I rely on to orient the vector of the electron's magnetic moment in this desired vector?

## Polarized Electron in a Rotating Reference Frame

So does this mean it would require a constant supply of energy to cause the electron to continuously change the vector of its magnetic moment? No, just a constant magnetic field.www.physicsforums.com

Dale said:Not that I know of. But why not just use a classical gyroscope instead?

## Polarized Electron in a Rotating Reference Frame

So does this mean it would require a constant supply of energy to cause the electron to continuously change the vector of its magnetic moment? No, just a constant magnetic field.www.physicsforums.com

Nugatory said:No, if you’re thinking about an electron and quantum mechanical spin

## Polarized Electron in a Rotating Reference Frame

So does this mean it would require a constant supply of energy to cause the electron to continuously change the vector of its magnetic moment? No, just a constant magnetic field.www.physicsforums.com