Across
- 3. a line drawn perpendiclar
- 5. producing a range of color
- 7. some light to pass through
- 8. of incidence the angle on the left
- 10. this wave is distant
Down
- 1. see through
- 2. spectrum it is the entire range
- 4. or rays meet at this point
- 6. theory added in small amounts to improve it
- 9. no light can pass through it