Tuesday, April 18, 2006
On my way back from the gym during lunch just now, I was following a bus on a dirt road. The air was filled with a light dust cloud about as far as the eye could see. The sun was bright, and about an hour past directly overhead (it's 2:00 here). Because the sunlight was uniformly illuminating the dust cloud, rather than the sunrays showing in the dust, the shadow of the bus showed. It was like the rays of a dark light shining from the top edge of the bus, a pyramidal shadow was clearly visible in the air. The side of the shadow along the bus was significantly lighter than looking through the back of the shadow and the shadow cast on the ground looked almost black. This created a clear three dimensional shadow.