You shall Puzzle Me This!

1234567891011121314151617181920
Across
  1. 3. The distance between one point on a wave to the same point
  2. 5. Transparent object with at least 1 curved side that causes light to change direction
  3. 6. The passage of a wave through a medium
  4. 9. A wave that is the number of the same pattern repeats in a given time
  5. 10. lens A lens that is thicker in the middle then at the edges.
  6. 14. transfer of energy by a wave to the medium through it travels
  7. 16. spectrum The range of wave lengths of frequencies over which EM radiation extends.
  8. 18. bouncing of a wave off a surface
  9. 19. lens A lens that is thicker at the edges than at the middle.
  10. 20. A material that allows most of the light that strikes it to pass through but it appears blurry
Down
  1. 1. wave a wave in which the distance is perpendicular to the direction.
  2. 2. the highest surface part of a wave.
  3. 4. A wave is the max distance that the wave moves.
  4. 7. A material that almost all of the light striking it to pass through
  5. 8. wave A wave that travels only through matter.
  6. 11. A material which light does not pass through.
  7. 12. The spreading of waves around obstacles.
  8. 13. wave It causes the particles in a medium to move parallel to the direct that it travels
  9. 15. The change in direction of a wave as it changes speed while moving from 1 medium to another.
  10. 17. A material in which a wave travels