Based on J. W. Goethes ideas on complementarity, put forward in his "Farbenlehre", the possibility of a perfect inversion of Isaak Newtonīs Experimentum Crusis is experimentally demonstrated.

This means that in addition to the monochromatic rays of light, studied by Newton, there also exist "monochromatic rays of shadow", which fact provokes us to reflect on the interpretation of the spectacular demonstrations performed with light, apertures and a glass prism.

This is a film that not only speaks to professionals but definitely also to any interested layman or student on various levels. Because of its high didaktical as well as aesthetical level it is well suited for use in education in optics. The optical arrangements shown are easily grasped and you are immediately tempted to go on experimenting along the lines indicated in the film.

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