Objekt 7
Rotating biconvex lens on wooden frame
Description
The wooden frame with sliding slit allows different areas of the color spectrum to strike the lens and be converted into their complementary colors.
Object description
probably Basel, around 1800
Glass, wood, black lacquered, metal, black lacquered (wing screws)
Purchase from the estate of Johann Jakob Brenner 1814
Deposit Institute of Physics of the University of Basel, Phys. 24/1.
Inv. 1986.433.