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单词 focal length
释义

focal length

​noun countable ​physics
UK
Word Forms
singularfocal length
pluralfocal lengths
DEFINITIONS1
  1. 1
    the distance from the centre of a lens or mirror to its focal point
    Synonyms and related words
    Terms in Physics
    centre of gravity
    density
    focal length

focal length

​noun countable ​physics
US
Word Forms
singularfocal length
pluralfocal lengths
DEFINITIONS1
  1. 1
    the distance from the center of a lens or mirror to its focal point
    Synonyms and related words
    Terms in Physics
    density
    focal length
    focal point
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更新时间：2026/5/3 17:24:08