And from me, thanks! Extremely interesting!
From tulip true "lid floats. (this is to what extent?)
Caravaggio is definitely a camera obscura used ..
I once did not even too lazy and the camera obscura in the bedroom did ... most wanted to check. Try a great lesson, especially if you have children-to 4m from the window diameter holes (in black paper, which box should be slapped-1-2 inches). As if one empirically determined. on the opposite wall hang a white screen.
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