Waves Revision Crossword

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Across
  1. 3. The bending of waves through gaps or around obstacles.
  2. 6. The change in speed of light as it passes from one medium to another (e.g. from air to glass).
  3. 7. The time taken for one wave to pass a point. It is also known as the inverse of the frequency.
  4. 9. The angle measured between the refracted ray and the normal is called the angle of _______.
  5. 11. The part of the EM spectrum with the shortest wavelength
  6. 14. The number of waves per second.
  7. 15. The distance travelled per second. It is also the frequency multiplied by the wavelength.
  8. 20. A group of all the types of electromagnetic radiation ordered in terms of their wavelength/frequency.
  9. 21. A _________ wave is one where the particles vibrate along the same direction as the wave.
Down
  1. 1. The part of the EM spectrum with the lowest energy
  2. 2. The horizontal distance from one crest to the next crest, one trough to the next trough or one point on a wave to the same point on the next wave.
  3. 4. a _______ wave is one where the particles move at right angles (90°) to the direction of travel of the wave.
  4. 5. A dashed line that is drawn perpendicular (at 90°) to any surface.
  5. 8. The triangular device used to spread light into its colours.
  6. 10. The bottom point of a wave.
  7. 12. The 'stuff' that a wave travels through.
  8. 13. The vertical distance from the axis to the top of the wave(crest) or bottom of the wave (trough). It is also half the vertical height of the wave.
  9. 16. The top point (peak) of a wave.
  10. 17. photographic _______ can be used as a detector for visible light, UV, Xrays, and gamma.
  11. 18. The part of the EM spectrum between visible and Xrays.
  12. 19. The angle measured between the incident ray and the normal is called the angle of _________.