Waves

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Across
  1. 3. an increase in the frequency of different mediums
  2. 5. distance between identical points
  3. 6. recurring series of of successive operations or states
  4. 9. a substance of material that carries a wave
  5. 10. oscillations are parallel to the direction of the wave's advance
  6. 12. height of wavelength
  7. 16. vibration between an electric field and a magnetic field
  8. 17. two waves combine by adding their displacement together
  9. 18. unit of frequency
  10. 19. the motion that is natural to an object: moving in a straight line
  11. 20. synchronous vibration of a neighboring object
Down
  1. 1. waves spread out as a result of passing through a narrow aperture
  2. 2. through the interface between one medium
  3. 4. regular variation in magnitude or position around a central point
  4. 7. the motion in which the object moves to and fro along a line
  5. 8. change in direction of a wavefront
  6. 11. the distance traveled by a point on the way
  7. 13. hertz
  8. 14. the time it takes to make a wavelength
  9. 15. oscillations are perpendicular to the direction of the wave's advance