From the batteries, everything is at your fingertips. We could go anywhere we want. I think we should start at the Faraday Ring. This thing is kinda' neat. To make it simple, the ring is made from a bunch of fiber optics, (glass tubes). You see, any magnetic field has effects on light. So by running light through the glass tubes, we can measure the size of the change of the light. This tells us the size of the magnetic field and the flow of the electrons and ions through the ring.
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To see the particle counter click here.