Across
- 2. with little, or no light at all
- 3. changing of light rays
- 5. Agent that stimulates sight
- 8. allows light to pass, but not detailed shapes
- 10. a surface that curves outwards
Down
- 1. a surface that curves inwards
- 4. throw back the body of light
- 6. material that allows light to pass
- 7. clear material to concentrate or dispersing light rays
- 9. not able to see through