Here I show a simple water level set up at an altitude of about 470 feet showing a distant mountain of 512 feet altitude dropping below the level line due to earth curvature. It also shows the horizon failing to rise to eye level, but instead dropping by more than half a sun/moon diameter, an...
Had an idea about how to very clearly and very easily show that the horizon isn't at eye level: take some pictures of some eyes!
You will need:
1. A camera
2. A high place with a level surface and a view to the horizon
3. A person pretty much the same height as you
4. The ability to hold a...