Some students believe the image in a mirror is on the mirror (rather than behind it).
Resources to Address This
Seeing yourself in the mirror (11-14)
Ref - SPT Li03 PN07
When you look in a mirror ... The image of your face appears to be behind the mirror. Indeed the farther you step back away from the mirror, the farther behind the mirror the image is.View Resource
Lenses and mirrors with rays (14-16)
Ref - SPT Ra01 PN05
Ray diagrams can be used to predict the image position, even in curved mirrors.View Resource
The virtual image in a plane mirror (11-16)
Ref - Practical Physics; Light and optics; Reflection of light;
The position of the image is shown to be behind the mirror (a virtual image).View Resource
- Goldberg, F. M. and McDermott, L. C. () Student difficulties in understanding image formation by a plane mirror The Physics Teacher, 24,
- Watts, D. M. () Student Conceptions of Light: A case study. Physics Education, 20,
- Osbourne, J., Black, P., Smith, M., and Meadows, J. () Primary SPACE project - light, Liverpool University Press.
- Ramadas, J. and Driver, R. () Aspects of secondary students' ideas about light, University of Leeds Centre for Studies in Science & Mathematics Education.