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Text File  |  1995-11-04  |  514b  |  17 lines
  1. wavelengths carrying more energy
  2. than longer ones. The main
  3. categories of electromagnetic
  4. radiation, going from shortest
  5. wavelength to longest, are: 
  6.  gamma rays: High-energy, with the
  7. shortest known wavelength, gamma
  8. rays are produced by extremely
  9. energetic reactions. 
  10.  x-rays: Because these short
  11. wavelengths possess high energy and
  12. can pass through soft tissues, doctors
  13. have long used them to make
  14. diagnostic images of human bodies.
  15. X-rays, generated only by  very
  16. high-energy phenomena, are 
  17.