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Text File  |  1992-09-02  |  389b  |  11 lines
  1. Osicillating electric and magnetic fields
  2. travelling together through space at a speed
  3. of nearly 300,000 km/186,000 mi per second.
  4. The (limitless) range of possible wavelengths
  5. or frequencies of electromagnetic waves,
  6. which can be thought of as making up the
  7. electromagnetic spectrum, includes radio
  8. waves, infrared radiation, visible light,
  9. ultraviolet radiation, X-rays, and gamma
  10. rays.
  11.