| A | B |
|---|
| the angle of incidence | equals the angle of reflection |
| an imaginary line perpendicular to a mirror | normal |
| light is | faster than sound |
| light waves | are transverse |
| light waves will | travel through a vacuum |
| sound waves | won't travel through a vacuum |
| transparent objects | allow light to pass through them |
| translucent objects | let most of the light through |
| opaque objects | do not let any light through |
| a flat mirror | plane |
| when a light ray passes from one medium to another, it bends | this is called refraction |
| convex lenses | bend light inwards |
| concace lenses | bend light outwards |
| rays of light | meet at the focal point |
| in the eye, an image is formed | on the retina |
| coloured part of the eye | the iris |
| takes information from the eye to the brain | optic nerve |
| red + green light | =yellow |
| red + blue light | =magenta |
| blue + green light | =cyan |
| a blue shirt under a white light | looks blue |
| a blue shirt under a red light | looks black |
| a blue light under a magenta light | looks bluish |
| a yellow shirt under a white light | looks yellow |
| a yellow shirt under a red light | looks red |
| a yellow shirt under a green light | looks green |
