In this paper a sequence of nine, easy to manufacture optical black-box experiments with increasing
levels of difficulty, and supportive frameworks for physics classes are introduced. They have been
evaluated in a lower-secondary school at the end of optics lessons. A black-box is a kind of
experimental task where the inner structure is not visible to the experimenter. Using mirrors,
beam-splitters, and blockers in a black-box to manipulate the light beam’s direction through this
specific experiment, students are instructed to vary input and observe the output of light to get an
idea of the possible inner structure. The presented sequence of black-box experiments requires a
basic knowledge of the linear propagation of light and is suitable for beginner physics. Furthermore
a framework for concrete implementation to physics classes is given, which covers suitable structure
of class, examples for helpful worksheets, and authentic students’ solutions. The difficulty o…