Sentence Examples


  • But the eye is tolerant of small changes in the focal adjustment which sensibly affect the scale-value.
  • The width of each of the portions aghc and acfe cut away from the lens was made slightly greater than the focal length of lens X tangent of sun's greatest diameter.
  • Focal length, composed of a double concave flint lens and a double convex crown.
  • Focal length.
  • On the other hand it is not necessary to reset the telescope after each reversal of the segments.4 When Bessel ordered the Konigsberg heliometer, he was anxious to have the segments made to move in cylindrical slides, of which the radius should be equal to the focal length of the object-glass.
 

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