NCEA L2 Waves

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Across
  1. 4. the change in speed of a wave when it enters a new medium
  2. 7. a single burst of energy travelling through a medium
  3. 9. a mirror or lens curved inwards
  4. 10. a mirror or lens curved outwards
  5. 12. at the ___________ angle, the angle of refraction is 90 degrees
  6. 14. an upside down image
  7. 16. interference where waves cancel out
  8. 17. the bending of a wave around a corner
  9. 18. the substance a wave is travelling through
  10. 20. waves in which the particles of the medium vibrate parallel to the direction of energy transfer
  11. 24. two waves combing to make a single waveform
Down
  1. 1. carried by waves
  2. 2. number of waves arriving per second
  3. 3. interference that makes a larger wave
  4. 5. the bouncing of a wave off a surface
  5. 6. a ________ image cannot be projected on to a screen
  6. 8. an image larger than the object
  7. 11. time for one complete wave to pass
  8. 13. waves in which the particles of the medium vibrate perpendicular to the direction of energy transfer
  9. 15. the focal lengths of a convex mirror and concave lens are?
  10. 19. an image made smaller than the object
  11. 21. substance that has a refractive index of 1.00
  12. 22. unit of frequency
  13. 23. a ______ image can be projected on to a screen