I remember a write up on your blog about Light not bending an stay's the same width in sunbeam shadow.
Last night ,5-23-12 7:10pm Universal Orlando,FL the Sun got blocked by a storm to the NW,This Sunbeam Arced in the sky right above my head (was widest directly above) an made a duplicate fake Sunset to the SE. Thought you could use it an explain what's involved more. Kinda proves the Earth's round, my thoughts...
I made a video of the event at:
Was a 26mb file an i could only mail email 25mb. Was to lazy to edit, I hate Computers!! 8^)