I've grown fixated on trying to capture the peculiar light patterns of wheels in motion. It fascinates me that such straight lines can result from rotating wheels viewed from the frame of reference of the ground. I'm reminded of the old physics view that a rotating wheel, observed in the instant from the ground's perspective, appears to be rotating about the point of contact with the ground, where the wheel's velocity is zero. The hub is moving at the velocity of the car, the top at twice that velocity.
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