Towards a phenomenography of light and vision

  title={Towards a phenomenography of light and vision},
  author={Nicholas J. Selley},
This paper presents a novel structure for displaying a phenomenographical hierarchy, and then proceeds to construct such a hierarchy for children's ideas on light and vision. Five independent dimensions of cognitive demand are proposed. After a discussion of children's use of Emission and Reception models in different contexts, suggestions are put forward for progression in learning in this area.