GK, That spectrum chart is a wonderful piece of art. Thanks for sharing it. It reminds me of one hanging on our classroom wall. It was a complete circle and looked so much like the one you posted. It must have been made by the same folks. Recently, EMDevices stirred some old memories from that time. I'm really surprised any of my brain cells or the memories survived from that era. Many of my comrades didn't. Not that they are missing much. There were no conservatives allowed in those ranks. Maybe the MIB masters knew none of us should be allowed to rise as a political power? Grumpy, "Why" does a changing magnetic field induce a current in a conductor?
"Why" is a current induced in a conductor moving in a magnetic field?
In other words: Why does magnetic induction occur at all?
Those are the best questions and the most important to answer. My answer will not solve any great mysteries but it is the most correct and the only answer according to my former teachers. The answer is either 'momentum', acceleration' or both. The most simple explanation is to look to the work of Lorentz on changes of moving point charge in a static magnetic field. Then look for recent discoveries covering circular polarized charges and light effecting magnetic fields. No matter how we ask the question it boils down to one or more of those roughly 20 basic known facts in physics. None of which have anything more than empirical evidence of their value or existence. So, it boils down to this... all of physics is based upon roughly 20 empirically (only) known facts with not one reasonable explanation for any one of them. Physics seeks to explain the unknown while it's basis is the unknown. The perfect circular logic.
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Topic: what is electrical current ? (Read 37218 times)
