Tuesday, July 5, 2011

X-Rays & Visible Light (Omnoms)

  • Emitted when an electron moves from certain excited states back down to its ground states, or when an electron that is moving very quickly is suddenly stopped.
  • Two groups - long wavelength (soft x-rays) and shorter wavelength (hard x-rays)
  • Used for radiography (x-ray photography) and to look at materials in industry for defects.
  • Dangers of using on humans: Skin diseases and cancers
Visible light
  • Colours of the rainbow:
  • Red (Longest Wavelength, Lowest Frequency)
  • Orange
  • Yellow
  • Green
  • Blue
  • Indigo
  • Violet (Shortest Wavelength, Highest Frequency)
  • Used for communications (fiber optics - transmits light between the two ends of the fiber)
  • Dangers: Too much light can damage the retina of your eyes

(Fun Fact:An easy way to remember the colours of the rainbow: Richard Of York Gave Battle In Vein )

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