Refraction of light

What you need to learn in this topic

1. Generalise that refraction occurs when light moves through medium of different densities
2. Draw ray diagrams to show refraction of light when light propagate from one medium to another medium of different densitie
3. Generalise the relationship between the angle of incidence, i and angle of refraction, r, when light travels from a medium of low density to a medium of high density
4. Justify the applications of refraction of light in daily life