P2.6 Waves Revision

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Across
  1. 2. The point where the rays meet.
  2. 3. ... objects emit more infrared radiation.
  3. 6. A use of microwaves.
  4. 7. Another name for a concave lens.
  5. 8. Light is an example of a .... wave
  6. 10. Another name for a convex lens.
  7. 11. As light enters a less dense medium, it travels ....
  8. 15. A use of ultraviolet radiation.
  9. 17. Another name of oscillations.
  10. 19. The seismic wave that is longitudinal.
  11. 20. The most ionising electromagnetic wave.
  12. 21. Radio and microwaves can be used for communication because of their long ....
  13. 24. The only electromagnetic wave that can be seen.
  14. 26. Xrays cannot be used for prenatal scanning, as it is too ....
  15. 27. ..., shiny objects are the best reflectors of radiation.
  16. 29. An image formed infront of the lens.
  17. 30. The change in direction and speed of light.
  18. 31. Frequency is proportional to ....
  19. 33. A perfect ... emits and absorbs the same amount of infrared radiation.
Down
  1. 1. The distance between the lens and the principal focus.
  2. 4. When the image is larger than the object.
  3. 5. An image formed behind the lens.
  4. 9. As light enters a denser medium, it will bend .... the normal.
  5. 12. S waves can only travel through ....
  6. 13. Sound waves require a ... to travel.
  7. 14. The electromagnetic wave with the longest wavelength.
  8. 16. In a transverse wave, the direction of oscillations are ... to the direction of energy transfer.
  9. 18. A use of gamma rays.
  10. 22. Sound is an example of a ..... wave
  11. 23. Ionisation can cause ....
  12. 25. An image that is upside down.
  13. 28. A use of radio waves.
  14. 32. The law of reflection states that the angle of incidence is ... to the angle of reflection.