Electromagnetic Spectrum

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  • Created by: cjohn12
  • Created on: 16-04-18 14:23
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  • Electromagnetic Spectrum
    • in a vacuum
      • light, and radiation travel at the same speed
        • 2.997 925 x10^8  ms^-1
          • This is usually denoted as the letter 'c'
        • For every frequency of radiation you can calculate the corresponding wavelength
          • speed of light = frequency of radiation X Wavelength in vacuum
    • Inverse square law
      • Waves transfer energy
        • Waves are propagated from a point. This point will be spherical
          • PROPAGATED = spread put
          • surface are of a sphere is 4xPixR^2
          • Intensity of the wave is shown in the formula
        • Energy is a quantity that is always conserved
  • Waves are propagated from a point. This point will be spherical
    • PROPAGATED = spread put
    • surface are of a sphere is 4xPixR^2
    • Intensity of the wave is shown in the formula
  • I = K/R^2
    • I = intensity of wave
    • R = distance from source
  • Your eyes can detect a very small range of frequencies.
    • This range is called visible light
    • Reigons
      • Electromagnetic Spectrum
        • in a vacuum
          • light, and radiation travel at the same speed
            • 2.997 925 x10^8  ms^-1
              • This is usually denoted as the letter 'c'
            • For every frequency of radiation you can calculate the corresponding wavelength
              • speed of light = frequency of radiation X Wavelength in vacuum
        • Inverse square law
          • Waves transfer energy
            • Energy is a quantity that is always conserved
      • You can sense frequencies just a little lower then the red of light as heat warming.
  • This is called infra-red radiation
    • You can sense frequencies just a little lower then the red of light as heat warming.
  • The frequencies that can not be seen by humans but by other animals such as bees which help plants grow and cause sunburn.
    • This is called Ultra-Violet
    • Reigons

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