In this subunit, students re-examine a number of the concepts of Subunit 1 in a more quantitative way. They investigate refraction, the refractive index of materials, and the formation of images by mirrors and lenses. Additional topics such as polarization, diffraction, and scattering of light are introduced. Students also learn that, through an understanding of its behaviour, light can be manipulated for technological goals.

Student level: 
Higher secondary school level, students of age 15+
Estimated duration: 
5-6 class periods