| A | B |
|---|
| Light | Visible energy given out by the sun, a light bulb etc. |
| Luminous object | An object that gives out light |
| Ray | A very narrow beam of light |
| Non-luminous objects | An object that does not give out light |
| Reflection | This is when light hits a mirror and 'bounces' off |
| Angle of incidence | Angle between the incident ray and normal |
| Angle of reflection | Angle between reflected ray and normal |
| Normal | A line drawn at 90 degrees to the mirror |
| Refraction | This is when light passes from one medium to another and is deviated |
| Dispersion | The splitting up of white light |
| Spectrum | The range of colours seen when white light passes through a glass prism |
| Filter | Changes white light by only letting part of the spectrum pass through |
