CP5 Electromagnetic Waves

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Across
  1. 3. Deoxyribonucleic acid. Chemical that makes up genes and chromosomes.
  2. 4. A place where there is no matter at all.
  3. 5. Electromagnetic radiation that has a shorter wavelength than ultraviolet radiation.
  4. 6. Electromagnetic radiation with the longest wavelengths.
  5. 8. An imaginary line at right angles to a surface where a ray of light hits it.
  6. 9. A hazard of receiving high frequency electromagnetic waves.
  7. 11. The entire frequency range of electromagnetic waves.
  8. 12. Electromagnetic radiation with the shortest wavelengths and highest frequencies.
  9. 14. A straight line with an arrow showing the direction of a beam of light.
  10. 16. Electromagnetic radiation with a shorter wavelength than visible light.
  11. 17. The boundary between two materials.
  12. 21. Absorbing radiation of one wavelength and re-emitting at a visible wavelength.
  13. 22. Cancer treatment in which a patient is given gamma radiation to kill the cancer cells.
  14. 23. The angle between an incoming light ray and the normal.
Down
  1. 1. Electromagnetic radiation we feel as heat and has a longer wavelength than visible light.
  2. 2. The change in direction when a wave goes changes speed going from one medium into another.
  3. 6. The angle between the normal and a ray of light that has been refracted.
  4. 7. Waves that all travel at the same speed in a vacuum, and are all transverse.
  5. 10. Vibrations of voltage and current in radio aerials.
  6. 13. Electromagnetic waves that can be detected by the human eye.
  7. 15. Electromagnetic radiation with a longer wavelength than infrared radiation.
  8. 18. wave A wave in which the vibrations are at right angles to the direction the wave is travelling.
  9. 19. The order colours of the visible spectrum from long to short wavelength.
  10. 20. A change in the DNA instructions in a cell.