electromagnetic spectrum

Other scales are used, such as wave number and energy. Each scale is subdivided into bands.

To Illustrate the EMS:

Gamma Ray Spectrum/Gamma Rays
X-Ray Spectrum/X-Rays
Ultraviolet Spectrum/UV/Ultraviolet
Visible Spectrum/Visible
Infrared Spectrum/Infrared
Microwave Spectrum/Microwaves
Radio Spectrum/Radio Waves

[Editor's note (Gz), 10/4/2002: Consolidated three E1 writeups here.]

                    Gamma Ray  |- 10 pm
                        X-Ray  |- 100 pm
violet   \                     |
(400 nm)  \        Soft X-ray  |_ 10 nm
blue       \               UV  |
green       \ ___              |- 100 nm
yellow      / --- Visible      |_ 1 µm
orange     /               IR  |
red       /                    |
(700 nm) /              T-ray  |- 100 µm
                               |
                               |_ 10 mm
                    Microwave  |_ 100 mm
                   Cell phone  |
                     Radio/TV  |- 1 m

Quick note, the infrared spectrum is everything you see before visible light, and the ultraviolet spectrum is everything you see after visible light...On the chart that is.You can't actually see infrared or ultraviolet. Hehehe...

• Bandwidth
  • Where this type of wave can be found, in terms of frequency
    • Where humans use this wavelength, and for what purpose

---

• Extremely Low Frequency (ELF) 
  • 0 KHz to 3 KHz
• Very Low Frequency (VLF)
  • 3 KHz to 30 KHz Includes:
    • Radio Navigation & Maritime/Aeronautical Mobile
      • 9 KHz to 540 KHz
    • Radio Navigation & Maritime/Aeronautical Mobile
      • 9 KHz to 540 KHz
• Low Frequency (LF)
  • 30 KHz to 300 KHz
• Medium Frequency (MF)
  • 300 KHz to 3000 KHz Includes:
    • AM Radio Broadcast
      • 540 KHz to 1630 KHz
    • Traveller Information Service
      • 1610 KHz
• High Frequency (HF)
  • 3 MHz to 30 MHz Includes:
    • Shortwave Broadcast Radio
      • 5.95 MHz to 26.1 MHz
• Very High Frequency (VHF)
  • 30 MHz to 300 MHz
    • Low Band: TV Band 1 - Channels 2-6
      • 54 MHz to 88 MHz
    • Mid Band: FM Radio Broadcast
      • 88 MHz to 174 MHz
    • High Band: TV Band 2 - Channels 7-13
      • 174 MHz to 216 MHz
    • Super Band (mobile/fixed radio TV)
      • 216 MHz to 600 MHz
• Ultra-High Frequency (UHF)
  • 300 MHz to 3000 MHz Includes:
    • Channels 14-70
      • 470 MHz to 806 MHz
    • L-band:
      • 500 MHz to 1500 MHz
    • Personal Communications Services (PCS)
      • 1850 MHz to 1990 MHz
    • Unlicensed PCS Devices
      • 1910 MHz to 1930 MHz
• Superhigh Frequencies (SHF) (Microwave)
  • 3 GHz to 30.0 GHz Includes:
    • C-band
      • 3600 MHz to 7025 MHz
    • X-band:
      • 7.25 GHz to 8.4 GHz
    • Ku-band
      • 10.7 GHz to 14.5 GHz
    • Ka-band
      • 17.3 GHz to 31.0 GHz
• Extremely High Frequencies (EHF) (Millimeter Wave Signals)
  • 30.0 GHz to 300 GHz Includes:
    • Additional Fixed Satellite
      • 38.6 GHz to 275 GHz
• Infrared Radiation
  • 300 GHz to 810 THz

• Visible Light (everyone's favorite)

  • 810 THz to 1620 THz
• Ultraviolet Radiation
  • 1.62 PHz to 30 PHz
• X-Rays
  • 30 PHz to 30 EHz
• Gamma Rays
  • 30 EHz to 3000 EHz

Some of this I got from Mr. Isaac Asimov's Fantabulous book The Universe: From Flat Earth to Black Holes and Beyond. I love him, and you will too... oh yes, you will...