Teaching sequence « Optics and vision » – New!

This teaching sequence was developed to help understand the phenomena at issue when images are formed by a convergent lens. The subject is presented succinctly, since it will be dealt with at length in the secondary five physics class. The model of the eye presented in this guide will allow teachers for secondary three (ST or AST) to make the function of the eye and its crystalline lens more concrete. This sequence also allows the students to be confronted with the false notion that images are always formed in the focal point of the lens (focal point of the crystalline lens of the eye). It is spread over about four periods and prioritises the scientific investigation process.

The student’s work is generally divided into three parts. To begin, we give the student an overview of various professions related to human vision. Then, the student discovers the formation of images by a lens through two scientific investigation processes and a directed laboratory. Finally, the student completes his exploration by various learning activities: finding the similarities between the model and the human eye, highlighting the limitations of the model and then exploring the formation of images by a lens in a more systematic manner, using drawing.


This LES was presented in our training sessions of 2014-2015