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Electromagnetic Spectrum. Visible light and color Energy, frequency, wavelength Real-world uses Astronomy uses. http://www.lcse.umn.edu/specs/labs/images/spectrum.gif. http://cache.eb.com/eb/image?id=73584&rendTypeId=35.

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electromagnetic spectrum
Electromagnetic Spectrum
  • Visible light and color
  • Energy, frequency, wavelength
  • Real-world uses
  • Astronomy uses
http upload wikimedia org wikipedia commons 9 99 em spectrum3 new jpg
http://upload.wikimedia.org/wikipedia/commons/9/99/EM_Spectrum3-new.jpghttp://upload.wikimedia.org/wikipedia/commons/9/99/EM_Spectrum3-new.jpg
slide5
http://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.pnghttp://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.png
visible light and color
Visible light and color
  • A small part of the total spectrum
  • Approximately 400-700nm (4000-7000Å)
    • 700-650nm: Red
    • 650-600nm: Orange
    • 600-550nm: Yellow
    • 550-500nm: Green
    • 500-450nm: Blue
    • 450-400nm: Violet
http solarsystem nasa gov deepimpact images spect prism sm jpg
http://solarsystem.nasa.gov/deepimpact/images/Spect-Prism-sm.jpghttp://solarsystem.nasa.gov/deepimpact/images/Spect-Prism-sm.jpg
http www windows ucar edu physical science magnetism images visible spectrum waves big jpg
http://www.windows.ucar.edu/physical_science/magnetism/images/visible_spectrum_waves_big.jpghttp://www.windows.ucar.edu/physical_science/magnetism/images/visible_spectrum_waves_big.jpg

Violet

ray gamma
-ray (gamma)
  • Very high energy
  • Very high frequency (big numbers)
  • Very short wavelengths (small numbers)
  • Emitted by radioactive sources
  • Astronomy: high energy processes, hot environments; colliding stars, around black holes, gas around galaxies
http today slac stanford edu images 2007 swift gamma ray lg jpg
http://today.slac.stanford.edu/images/2007/swift-gamma-ray-lg.jpghttp://today.slac.stanford.edu/images/2007/swift-gamma-ray-lg.jpg
slide14
http://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.pnghttp://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.png
x ray
X-ray
  • High energy
  • High frequency
  • Short wavelengths
  • Used to determine whether bones are broken, and teeth have cavities
  • Astronomy: similar to -ray, plus the Sun
slide17
http://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.pnghttp://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.png
ultraviolet uv
Ultraviolet (UV)
  • Slightly higher frequencies and shorter wavelengths than humans can see
  • Some birds and insects can see in the UV
  • UV light causes suntans, sunburn, cancer, can be used to sterilize equipment
  • Astronomy: Used to study the Sun and other hot objects
http sohowww nascom nasa gov data realtime eit 195 1024 latest html
http://sohowww.nascom.nasa.gov/data/realtime/eit_195/1024/latest.htmlhttp://sohowww.nascom.nasa.gov/data/realtime/eit_195/1024/latest.html
slide20
http://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.pnghttp://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.png
visible light
Visible Light
  • Approximately 400-700nm (4000-7000Å)
slide22
http://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.pnghttp://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.png
infrared
Infrared
  • Slightly longer wavelength and lower frequency than the human eye can see.
  • Some animals including some snakes, some bats, and some insects can see IR.
  • IR goggles help firefighters, soldiers, and home insulation experts; remote controls use IR
  • Astronomy: IR travels through dust so is good to look at young forming stars. (Spitzer Space Telescope)
http gallery spitzer caltech edu imagegallery image php image name ssc2007 19a
http://gallery.spitzer.caltech.edu/Imagegallery/image.php?image_name=ssc2007-19ahttp://gallery.spitzer.caltech.edu/Imagegallery/image.php?image_name=ssc2007-19a
slide27
http://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.pnghttp://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.png
microwave sub mm
Microwave/Sub-mm
  • Low energy
  • Low frequency (small numbers)
  • Long wavelength (large numbers)
  • Used in microwave ovens, cellphone signals
  • Astronomy: cooler objects such as clouds of dust, and the Cosmic Microwave Background (light from the Big Bang)
slide30
http://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.pnghttp://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.png
radio
Radio
  • Very low energy
  • Very low frequency
  • Very long wavelengths
  • Radio transmissions for music, TV, walky-talkies, GPS, communicate with satellites, weather radar, radar guns
  • Astronomy: cool objects such as gas clouds, entire galaxies, SETI (potential alien communications)
http www thunderbolts info tpod 2006 image06 060123nebula jpg
http://www.thunderbolts.info/tpod/2006/image06/060123nebula.jpghttp://www.thunderbolts.info/tpod/2006/image06/060123nebula.jpg
http www andor com image lib lores introduction introduction 20 light intlight 201 20small jpg
http://www.andor.com/image_lib/lores/introduction/introduction%20(light)/intlight%201%20small.jpghttp://www.andor.com/image_lib/lores/introduction/introduction%20(light)/intlight%201%20small.jpg
slide37
http://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.pnghttp://upload.wikimedia.org/wikipedia/en/thumb/8/8a/Electromagnetic-Spectrum.png/350px-Electromagnetic-Spectrum.png