I read it again. You're position is the spaceship would magically still be rotating since the evaporated atom are not rotating once they leave the silver sample.
You're input is received and has received the consideration is deserves. I would like a diversity of opinions on the original...
This can be cleared up rather simply. Imagine there is a nonrotating space ship in outer space that contains a stationary mass of silver connected to a motor. We then start rotating the motor and silver. When the silver spins the spaceship begins to counter rotate. Angular momentum is conserved...
If you are suggesting that the atoms do not rotate, then where does all the angular momentum of the rotating silver sample go? And at what size do you suggest this rotation disappear? Can two silver atoms rotate?
I'm envisioning the sample of silver is attached to a motor so that the sample can be spun. If the motor rotates the sample 360 degrees in physical space within the Stern Gerlach apparatus the quantum spin of each rotated spin 1/2 particle would flip. Varying degrees of physical rotation would...
If a spin 1/2 particle we're to be rotating as it was passing through a Stern Gerlach experiment wouldn't this create particle paths which may switch from spin up to spin down or vice versa, or even oscillate in mid flight?
If the experiment were done with a rapidly rotating silver atom source...