Block, SkipCaptcha, apieditor, Automoderated users, Bots, edit, ratelimit-exempt
58,183
edits
Changes
Jump to navigation
Jump to search
Line 27:
Line 27: − +
→top: Spelling/Grammar Check, typos fixed: 1600 KHz → 1600 kHz
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).
Even higher frequencies give as microwave radiation, used in radar and cooking. Still higher is infrared (which can keep food warm from a lamp or heat up your skin from sunlight or fire). Infrared is used in "black light" photography.
Even higher frequencies give as microwave radiation, used in radar and cooking. Still higher is infrared (which can keep food warm from a lamp or heat up your skin from sunlight or fire). Infrared is used in "black light" photography.