Waves 2 - The EM Spectrum - Mindmap in A Level and IB Physics

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Waves 2
- The EM Spectrum
  - X Rays
    - Wavelength range is x10-10
      - Used to image objects inside a suitcase or body
  - Gamma Rays
    - Shortest wavelength (x10-12) and largest frequency
      - Can be used to kill cancer cells and to sterilise equipment in hospitals
  - Ultraviolet
    - Wavelength range is x10-8
      - Used in sunbeds for tanning and to detect forged bank notes
  - Visible Light
    - Wavelength range is x10-7
      - Used to see and for endoscopes with total internal reflection
  - Infrared
    - Wavelength range is x10-6
      - Used by alarm systes and in remotes
  - Microwaves
    - Wavelength range is x10-3
      - Used for mobile phone links and communications via satellite.
  - Radio waves
    - Wavelength range is x10-2 and below
      - Used for TV and radio transmissions with long wavelengths so that the signals do not diffract past large objects like hills.
Gamma Rays
- Shortest wavelength (x10-12) and largest frequency
  - Can be used to kill cancer cells and to sterilise equipment in hospitals

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