A camera obscura in my opinion still belongs to the most impressive hands on exhibits in the optical field. It makes the visitor experience in a simple way how a lit up object is projected on a translucent screen without any technical support. And because most of the visiors are not expecting the upside down view, they do what science exhibits exactlly are made fot: start asking questions. Why…? Just try and think about it. The citizens of Lübeck allready tried this out. The camera obscura is the second exhibit of another set of ten, that will monthly be opened in each of the 10 city districts. Each of them has a partner exhibit in the old city center, where the “Wissenschaftspfad” (Science parcours) was opened on January 13th this year. (image source)
The according coloured triangles serve as seats and are symbolizing, that the exhibit is part of the initiative according to the “Stadt der Wissenschaft” (city of Science), that Lübeck is awarded in 2012. At the moment the triangles are still grey due to the cold weather, but the picture above gives you an impression how it hopefully will look like soon, when they get painted.