| A | B |
|---|
| light | a form of radiant energy that travels in a straight line |
| shadow | block of light |
| natural light | primary source of light - fire, sun, some animals |
| artificial light | light not from the sun |
| primary colors of light | red, blue, green |
| white light | all colors of visible light |
| visible light | light that can be seen by the human eye |
| focal point | place where light meets at a single point after passing through a lens |
| reflection | light can bounce off one object to another |
| refraction | light rays can bend |
| opaque | will not allow light to pass through |
| translucent | allows some light to pass through |
| transparent | allows all light to pass through |
| incident ray | ray of incoming light |
| reflected ray | ray of outgoing light |
| angle of incidence | angle between the incident ray and a reflecting surface |
| angle of reflection | angle between the reflected ray and a reflecting surface |
| < of i = < of r | the angle of incidence equals the angle of reflection |
| prism | triangular glass or plastic object that bends and disperses light |
| dispersion | white light bent and separated into colors of the visible spectrum (rainbow colors) |
| focal length | distance between lens and focal point |
| absorption | take in light rays |
| protractor | tool used to measure angles |
| acute | angle smaller than 90 degrees |
| right angle | angle = to 90 degrees |
| obtuse | angle greater than 90 degrees |
| ROY G BIV | colors of the spectrum |
| Focal Point | Where 2 rays of light intersect or cross |
| Focal Length | Distance from the jar to where the light crosses |
| Prism | Disperses white light |
