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background radiation Definition

background radiation

noun

  1. Astron. low-intensity, multidimensional microwave radiation present in space: its existence is used to support the validity of the big-bang theory since it is thought to be a remnant of the original explosion
  2. Physics low levels of natural radiation existing on earth as a result of high-energy cosmic rays, the radioactive decay of rock, etc.

background radiation Usage Examples

Adjective modifier

  • cosmic: This " horizon problem " makes it difficult to account for the uniformity of the cosmic background radiation.

Modifies a noun

  • level: Although both techniques use radiation, exposure is low and within natural background radiation levels.

Noun used with modifier

  • microwave: CMB 3K: The cosmic microwave background radiation, R. B. Partridge, pub.

Browse dictionary entries near background radiation

  1. ‹ background
  2. ‹ backgammon
  3. ‹ backfire
  4. ‹ backfill
  5. ‹ backfield
  6. ‹ backer
  7. ‹ backed
  8. ‹ backdrop
  9. ‹ backdoor
  10. ‹ backdate
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