IGCSE Physics - Waves

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Across
  1. 5. The changing of speed, and consequently the direction, of a wave as it changes medium.
  2. 7. Used for satellite communications and for cooking food.
  3. 8. Waves with oscillations that are perpendicular to the direction of travel/energy transfer.
  4. 9. The bouncing back of a wave at a boundary.
  5. 10. High energy radiation rays used for detecting and treating cancers, and sterilising food and medical implements.
  6. 12. The maximum displacement of a wave from its undisturbed (equilibrium)position.
  7. 13. The time it takes for one complete wave to pass a given point.
  8. 15. The unit of frequency (Hz).
  9. 16. A process of energy transfer through oscillations, without matter being transferred with it.
  10. 18. The only type of electromagnetic radiation that our eyes can detect.
Down
  1. 1. The change in a wave’s observed wavelength and frequency when there is relative motion between its source and an observer.
  2. 2. A device that converts the particle oscillations of a sound wave into an electrical signal that can be analysed using an oscilloscope.
  3. 3. Used for thermal imaging, but it can cause skin burns.
  4. 4. Waves with oscillations that are parallel to the direction of travel/energy transfer.
  5. 6. Used for medical imaging and security scanners. They can cause cell damage and mutations.
  6. 11. Used for television and radio signals.
  7. 14. The number of waves passing a given point in a second.
  8. 16. The distance from a point on one wave to the same point on the adjacent wave (ie. peak to peak or trough to trough).
  9. 17. A measure of the frequency of the oscillations of a sound wave.