| 词汇 | 自旋 |
| 释义 | 自旋 And, according to the right- hand rule, they would be spinning, by our convention, anticlockwise. Still, one might imagine that the particle’s spin around any axis was set before anyone ever came along to prod it. That’s certainly what we ordinarily assume in life. Anyone actually living in the system of spins will not see them. According to the theory of general relativity, the speed and angular momentum of such a large spinning body twists the space and time around it in a process called frame- dragging. With the magnetic field turned on, the iron layers both magnetize, say, in the spin- up direction, so all of the spin- down electrons move through the entire sample without scattering. Some of these electrons travel through the DNA forest and are fed into a device that measures their spin polarization. If spinning succeeded on that same lock object in the recent history and the thread holding the lock is running, then spinning is likely to succeed again. There were some hints of spin provided by experiment, but they were very vague. While other physicists have shown that passage through a vapour of chiral molecules can affect the spin polarization of electrons, the effect is minuscule compared with what is seen with DNA. It can also spin this way. Both of these are spinning but they are spinning in the same level. I soon saw that this new equation gave correctly the spin and the magnetic moment of the electron. And since we don't know the absolute up and down in the universe, it is possible that some of the electrons may be spinning up. This is because the energy required to transport and process spins is much less than that needed to create electron currents. This equation is of some value for describing particles without spin— certain kinds of mesons— but does not apply at all to the electron. This technique is known as spin locking. Variations in Earth’s magnetic field cause them to spin in different ways, each of which leaves the compass in a slightly different chemical state. |
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