  In a lesson on holography a tension is to be found between the ray model, the
wave model, the phasor model and the particle model. Lessons depend on the
previous experiences of the students, the intentions of the teacher as well as
on other parameters and therefore provide a diversity in emphasis while
explaining holographic effects. As class discussion concerning selected areas
of interference optics and specifically holography develops in a questioning
manner and with limited intervention from the teacher, numerous student
conceptions with regard to interference optics and different model conceptions
of light can be identified. Student interviews in which these discovered
concepts are explored in greater detail can provide in depth information.
Primary student conceptions, which were gathered in the main research conducted
for a dissertation project will be presented here and analysed with a view to
their didactic consequences.
