The window in Lingy Hut reminded me of the grid that I use to demonstrate the inverse square law for light to my classes. Shine a light so that it covers one square then move twice as far away and show that it covers all four squares meaning the same energy has spread over 4x the area and that if you double the distance then the intensity will quarter.
So I took the photo above from the middle of the room and the one below from the far wall. The area above is 3.1 x the area below so it has not quite worked but the distances were guessed.
