LED test

A simple LED pen shows how boats and the Sun become hidden by the horizon on a flat surface as a result of distance and perspective. This was accomplished with only 30 feet of real estate if I had 40 feet the light would disappear into the ground. The pen light was flat on the ground and my iPhone 11 Pro Max was perpendicular to the ground. And as you can see as the lenses got close to the floor the brightness of the pen light diminishes instantly.