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Detectability of Extraterrestrial Technological Activities


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Author Topic: Detectability of Extraterrestrial Technological Activities  (Read 669 times)
Jennifer Murdoch
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« on: February 04, 2010, 01:20:04 pm »

      Page 5






            TABLE 2: Characteristics of the Electromagnetic Spectrum

              (All the numbers that follows each 10 are exponents.)
       ==================================================================
       Spectrum      Frequency          Wavelength        Minimum Energy
       Region        Region [Hz]        Region [m]        per photon [eV]

       ==================================================================
        Radio         3x106-3x1010       100-0.01          10-8 - 10-6
        Millimeter    3x1010-3x1012      0.01-10-4         10-6 - 10-4
        Infrared      3x1012-3x1014      10-4-10-6         10-4 - 10-2
        Optical       3x1014-1015        10-6-3x10-7       10-2 - 5
        Ultraviolet   1015-3x1016        3x10-7-10-8       5 - 102
        X-rays        3x1016-3x1019      10-8-10-11        102 - 105
        Gamma-rays    r3x1019            s10-11            r105
       ==================================================================

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