Definición de focal length en inglés:

focal length

Saltos de línea: focal length


  • 1The distance between the centre of a lens or curved mirror and its focus.
    Más ejemplos en oraciones
    • Yet Stork determined the probable focal length of a concave mirror made by inverting and silvering the convex mirror shown in the painting.
    • This produces a rounded lens with a small focal length, so the drop can focus light only to a point near itself.
    • This will give a negative focal length for a convex lens of air inside water.
  • 1.1The equivalent distance in a compound lens or telescope.
    Más ejemplos en oraciones
    • He developed a general rule for the focal length of lenses and described a reflecting telescope.
    • Huygens later went back to the study of optics and developed long focal length lenses used in ‘aerial telescopes.’
    • One evening he was observing with a rather crude refractor (a lens telescope), with a focal length of 24 feet.

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Palabra del día maelstrom
Pronunciación: ˈmeɪlstrəm
a powerful whirlpool in the sea