reflection of light
- Effects of smooth and rough surfaces on reflection
- Describe the characteristics of images formed by a smooth plan mirror
- Describe the characteristics of images formed by curved mirrors
- Draw ray diagrams
- Define the normal, angle of incidence, angle of reflection
- Understand that the angle of incidence = angle of reflection and apply it in ray diagram drawing
- Learn common applications of reflection in everyday life
refraction of light
- Observe and draw paths of light rays incident obliquely at a boundary between two mediums of different optical densities
- Explain refraction as a change in the speed of light in different optical mediums
- Define normal, angle of incidence, angle of refraction, total internal reflection
- Calculate refractive index
- Calculate critical angle
- Understand that an incident angle greater than the critical angle results in total internal reflection
- State applications of total internal reflection Eg. fibre optics
Lenses
- Effect of converging lenses on a beam of light
- Define focal length on a converging lens
- Draw ray diagrams to show the formation of real and virtual images of an object with the use of a converging lens at different distances
- Describe applications of converging lenses
colours of light
- Observe dispersion of white light and list the colours of the spectrum of visible light
- Explain dispersion of light with reference to refraction
- Identify colours produced when primary colour lights are mixed
- Explain the colours of objects formed based on the absorption and reflection of light
- Explain changes in light passing through coloured filters