| A | B |
|---|
| luminous | makes its own light |
| non-luminous | does no make its own light |
| shadow | far side of an object from a light source, no light falls here |
| straight lines | light travels in these |
| ray | a beam of light that travels in a straight line |
| ray diagram | a diagram where light is represented by straight lines |
| normal | a line drawn at 90° |
| absorbed | when light in by the object |
| reflected | when light bounces off an object |
| opaque | will not allow light to pass through |
| translucent | allows light to pass through, but the light is scattered |
| transparent | allows light to pass through and gives a clear image |
