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The Electromagnetic '''Spectrum''' is the entire range of electromagnetic radiation extending in frequency from zero Hertz to 10<sup>23</sup> cycles per second (or Hertz).<ref>http://science.nasa.gov/newhome/help/glossfig1.htm</ref>
The electromagnetic '''spectrum''' is the entire range of electromagnetic radiation extending in frequency from zero Hertz to 10<sup>23</sup> cycles per second (or Hertz).<ref>http://science.nasa.gov/newhome/help/glossfig1.htm</ref>
Longer wavelengths of electromagnetic radiation such as used in AM radio have lower frequencies (540 to 1600 KHz). FM radio has much shorter wavelengths and higher frequencies (88 to 108 MHz).
Longer wavelengths of electromagnetic radiation such as used in AM radio have lower frequencies (540 to 1600 KHz). FM radio has much shorter wavelengths and higher frequencies (88 to 108 MHz).