Light, sound and waves

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Across
  1. 1. in a sound wave __________ is the portion of the longitudinal wave that is high pressure
  2. 5. materials reflect or absorb light; you cannot see through it.
  3. 7. formed where light rays cannot reach
  4. 11. materials that allow light to pass through
  5. 12. no colors reflected
  6. 13. every sound wave originates from a ________
  7. 14. in sound waves ___________ is dependent on frequency
  8. 15. Thin beam of light
  9. 16. noise canceling headphones work because of __________ interference
  10. 17. all colors reflected
Down
  1. 2. what we hear when sound reflects off a smooth, hard surface
  2. 3. When sound bends around an obstacle
  3. 4. red is reflected all other colors are absorbed
  4. 6. loudness/sound intensity is dependent on ____________
  5. 8. speed of sound depends on 3 things: elasticity, __________ and temperature
  6. 9. light consists of
  7. 10. materials that scatter light; objects appear blurred