Radiation

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Across
  1. 2. The longest type of electromagnetic waves, used for communication.
  2. 5. How many waves pass a point in one second, measured in Hertz.
  3. 7. A type of electromagnetic wave that can cause sunburn.
  4. 8. A type of lens that makes light rays come together.
  5. 9. The top of a wave
  6. 11. When light bends as it passes from one material to another.
  7. 13. A high-energy wave that can pass through skin but not bones.
  8. 15. The distance between two peaks of a wave.
  9. 17. When light bounces off a surface at the same angle it arrived.
  10. 18. The highest energy wave we have that is used for medical treatments
Down
  1. 1. A type of electromagnetic wave used in mobile phones and cooking.
  2. 3. The height of a wave from the rest position to the top of a peak.
  3. 4. A type of lens that makes light rays spread apart.
  4. 6. The range of colours seen when light is split up.
  5. 10. The bottom of a wave
  6. 12. The type of EM wave we can see
  7. 14. A type of electromagnetic wave that we feel as heat.
  8. 16. A curved piece of glass or plastic that bends light to focus or spread it.