Contact Angle - MK1

When I was playing around with the raspberry pi camera, I tested a couple of things with taking pictures close to objects. After a while I was interested if it also possible to determine the contact angle of a droplet sitting on some substrate. I was surprised that it worked out actually quite well. Although this setup is very simple it might be interesting for teaching. If there are people interested in, I will add some background info on contact angle measurements and modify if for Thingiverse Education.