The Oxford Biblical Studies Online and Oxford Islamic Studies Online have retired. Content you previously purchased on Oxford Biblical Studies Online or Oxford Islamic Studies Online has now moved to Oxford Reference, Oxford Handbooks Online, Oxford Scholarship Online, or What Everyone Needs to Know®. For information on how to continue to view articles visit the subscriber services page.

Related Content

Related Overviews


More Like This

Show all results sharing these subjects:

  • Science and technology
  • Earth Sciences and Geography


Show Summary Details


meteorological optical range

Quick Reference


A formally defined distance, essentially equivalent to visibility: the length of path in the atmosphere over which the light from a known source is reduced to 0.05 of its original intensity.

Reference entries