equivalent focal length

noun

optics the ratio of the size of an image of a small distant object near the optical axis to the angular distance of the object in radians

Nearby words

  1. equivalence relation,
  2. equivalency,
  3. equivalent,
  4. equivalent air speed,
  5. equivalent circuit,
  6. equivalent weight,
  7. equivalve,
  8. equivocal,
  9. equivocally,
  10. equivocate

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