| A | B |
|---|
| light ray | a straight-line beam of light as it travels outward from its source |
| opaque | completely blocking light from passing through it |
| transparent | letting all light through, so that objects on the other side can be seen clearly |
| translucent | letting only some light through, so that objects on the other side appear blurry |
| refraction | the bending of light rays as they pass from one substance into another |
| prism | a cut piece of clear glass (or plastic) with two opposite sides in the shape of a triangle or other geometric shape |
| spectrum | a band of colors produced when light goes through a prism |
| electromagnetic spectrum | all the wavelengths of visible and invisible light in order, from short (gamma rays) to long (radio) |
| reflection | the bouncing of a light wave off a surface |
| reflection |  |
| refraction |  |
| prism |  |
| electromagetic spectrum |  |
