Many students cannot correctly define 'an image’.
For example, some students believe images made by lenses can be in two places and/or lenses are not necessary to form images e.g. all objects will form an image.
Resources to Address This
Pinhole camera and lens camera (11-16)
Ref - Practical Physics; Light and optics; Pinhole camera and lens camera;
Carrying out this series of activities will consolidate the idea of an image. It also shows clearly the effect of a lens bringing together a series of images.View Resource
The following studies have documented this misconception:
- Fetherstonhaugh, T. and Treagust, D. F. () Students’ Understanding of Light and Its Properties: Teaching to Engender Conceptual Change. Science Education, 76 (6),
- Kaltakci-Gurel, D., Eryilmaz, A. & McDermott, L. C. () Development and application of a four-tier test to assess pre-service physics teachers’ misconceptions about geometrical optics. Research in Science & Technological Education, 35 (2),