It doesn’t really matter which way the current is flowing if you are a part of a 100 million-volt circuit. Nonetheless, Husband found himself arbitrating an “up or down” dispute at work yesterday. Fortunately, we had already found this page to help explain the whole thing to Kid. I wish I could embed the video here–it’s worth clicking over there to check it out.
It’s amazing how much cartoons affect my understanding of the physical world. After years of seeing cartoon lightning bolts shoot down from the sky, it is tough to wrap my brain around the idea that the earth reaches up to the lightning to connect the circuit, through which massive current flows down from the sky. The light, on the other hand, moves in segments. In each of the segments, the light travels down, but these segments discharge from the earth upwards, such that the overall picture is light traveling up.





