focal length

Word family adjectivefocalnounfocalizationfocimeterfocusingfocal lengthfocal pointfocus groupfocusverbfocalizeadverbfocally

ˈfocal length noun [countableC] technical

the distance between the centre of a lens and the focal point 焦距

Examples from the Corpus

focal length• Properties of a parabola All parabolas are similar. Focal length a determines the magnitude.• A single focal length, fixed-focus is often sufficient.• The image produced by a diverging lens is however frequently virtual and consequently the focal length does not seem easy to determine.

词汇	focal length
释义	focal length Word family adjectivefocalnounfocalizationfocimeterfocusingfocal lengthfocal pointfocus groupfocusverbfocalizeadverbfocally ˈfocal length noun [countableC] technical the distance between the centre of a lens and the focal point 焦距 Examples from the Corpus focal length• Properties of a parabola All parabolas are similar. Focal length a determines the magnitude.• A single focal length, fixed-focus is often sufficient.• The image produced by a diverging lens is however frequently virtual and consequently the focal length does not seem easy to determine.
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