Week 2 - Watching Shadows -Matthew Byrd

Hello all My names Matthew Byrd and I look forward to working with all of you this quarter.
The other morning I was staring aimlessly at the wall, as I often do right after waking up, and I noticed a shadow being cast right on the wall that was crisp and clean. Even though the light source was a ways away the shadow was crisp but as you got closer the shadows edges began to fade and shed multiple shadows even though there was only one light source from the window. It made me think about light hang and focus. What the relationship is between the crispness of a shadows edges and say a hard edge cast by a Source 4 .