wave, light, sound crossword

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Across
  1. 4. the SI unit of frequency, equal to one cycle per second
  2. 5. the process by which one thing absorbs or is absorbs by another thing
  3. 6. wave a wave vibrating in the direction of propagation
  4. 9. the wavelengths that are visible to most human eyes
  5. 11. lowest point of a wave
  6. 12. light with the shortest wavelengths and the highest energies and frequencies in the electromagnetic spectrum
  7. 13. highest point of a wave
  8. 14. change in direction of a wave at a boundary between two different media
  9. 15. the rate at which a vibration occurs that constitutes a wave
Down
  1. 1. the maximum extent of vibration or oscillation, measured from the position of equilibrium
  2. 2. invisible rays that are part of the energy that comes from the sun
  3. 3. a unit to measure the intensity of a sound
  4. 7. quality of a sound governed by the rate of vibrations producing it
  5. 8. the process by which a beam of light or other systems of waves is spread out as a result of passing through a narrow aperture or across an edge
  6. 10. a physical phenomenon characterized by its frequency, wavelength, and amplitude