The Electromagnetic Spectrum is the entire range of radiation extending in frequency from 1023 cycles per second (or Hertz) to zero Hertz.<ref>http://science.nasa.gov/newhome/help/glossfig1.htm</ref>
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The Electromagnetic Spectrum is the entire range of radiation extending in frequency from 10<sup>23</sup> cycles per second (or Hertz) to zero Hertz.<ref>http://science.nasa.gov/newhome/help/glossfig1.htm</ref>