home *** CD-ROM | disk | FTP | other *** search
/ The Epic Interactive Encyclopedia 1998 / Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso / I / Ionosphere / INFOTEXT < prev   
Text File  |  1992-09-02  |  299b  |  9 lines
  1. Ionized layer of Earth's outer atmosphere
  2. (60-1,000 km/38-620 mi) that contains
  3. sufficient free electrons to modify the way
  4. in which radio waves are propagated, for
  5. instance by reflecting them back to Earth.
  6. The ionosphere is thought to be produced by
  7. absorption of the Sun's ultraviolet
  8. radiation.
  9.