Penumbra Astronomy Demonstration

This work was inspired by high school student Christopher Martin Olson of Sacramento Waldorf School. His winning entry in the AAPT's 2019 high school photo contest can be found here:
https://aapt.org/Programs/contests/winners.cfm?theyear=2019

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/ecks481AtKN

See also:
https://instructional-resources.physics.uiowa.edu/demos/8a2037-eclipse-models-and-umbrapenumbra-demos

DCS 8A20.37

Display case made with laser cutter using box designed with:
http://jeromeleary.com/laser/
Will upload some photos when this build is complete.