| A | B |
|---|
| plane mirror | a mirror which is flat |
| the speed of light through a vacuum | 300,000 m/s |
| transparent | describes an object that transmits light, or allows light to pass through it |
| translucent | describes an object that lets some light waves pass through, but blocks others |
| refraction | the bending of light rays as they enter a new medium |
| amplitude | the height of a wave measured by the distance between the center of the wave and the crest or trough |
| colours | different frequencies of visible light; there are seven in the spectrum |
| light | energy that we can see and sometimes feel as heat |
| opaque | describes an object that reflects or absorbs all the light that strikes it |
| incident rays | rays coming from a luminous source towards a mirror |
| reflected rays | rays bouncing away from a mirror |
| the normal | an imaginary line at 90 degrees to the surface of a mirror |
| dispersion | the splitting of white light into its colours |
| spectrum | the display of colours resulting from the splitting of white light |
| Richard Of York Gave Battle In Vain | Red Orange Yellow Green Blue Indigo Violet |
| shadows | formed when light meets an opaque object |
| angle of incidence | angle at which light rays hit a smooth surface |
| angle of reflection | angle at which light rays move away from a smooth surface |
| luminous | something which emits light, e.g, a lamp |
