wave properties

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Across
  1. 3. passage of light through an object
  2. 6. wavelengths each second that pass
  3. 7. direction changes when through an object
  4. 12. only passes through matter
  5. 14. particles move parallel to the wave
  6. 16. goes through empty space and matter
  7. 17. reflection is equal to the way it hit
  8. 19. gives energy one place to another
Down
  1. 1. particles are farthest apart
  2. 2. particles are closest together
  3. 4. perpendicular to the wave
  4. 5. material a wave travels through
  5. 8. highest point on a transverse wave
  6. 9. the bouncing of a wave of a surface
  7. 10. when overlapping waves combine
  8. 11. direction changes when a wave changes speed
  9. 13. maximum distance a wave moves
  10. 15. lowest point on a transverse wave
  11. 18. energy from a wave to the medium
  12. 19. length from point to point on waves