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%ما هو (من)٪ 1 - تعريف
IS A NUMBER THAT CAN BE CALCULATED FOR POLYCYCLIC AROMATIC HYDROCARBONS FROM THEIR STRUCTURE
F number (chemistry)
F number is a correlation number used in the analysis of polycyclic aromatic hydrocarbons (PAHs) as a descriptor of their hydrophobicity and molecular size. It was proposed by Robert Hurtubise and co-workers in 1977.
F-number
![Diagram of decreasing [[aperture]]s, that is, increasing f-numbers, in one-stop increments; each aperture has half the light-gathering area of the previous one.](https://commons.wikimedia.org/wiki/Special:FilePath/Aperture diagram.svg?width=200 "Diagram of decreasing [[aperture]]s, that is, increasing f-numbers, in one-stop increments; each aperture has half the light-gathering area of the previous one.")
![Yashica-D TLR]] camera front view. This is one of the few cameras that actually says "F-NUMBER" on it.](https://commons.wikimedia.org/wiki/Special:FilePath/Yashica-D front.jpg?width=200 "Yashica-D TLR]] camera front view. This is one of the few cameras that actually says \"F-NUMBER\" on it.")
RATIO OF THE FOCAL LENGTH TO THE DIAMETER OF THE ENTRANCE PUPIL
F/stop; F stop; F number; F-stop; Focal ratio; F-Stop; F-Number; Relative aperture; F stops; T stop; Fstop; Relative Aperture; Working f-number; Tstop; Tstops; T-stops; T-stop; T stops; F-stops; F/number; Half stop; Stop number; T-stop system; F Number; F/; Ƒ-number; Transmission stop; T-number (photography); T number (photography); H stop; H-stops; H-stop; H stops; H number (photography); H-number (photography); F/11
In optics, the f-number of an optical system such as a camera lens is the ratio of the system's focal length to the diameter of the entrance pupil ("clear aperture").Smith, Warren Modern Optical Engineering, 4th Ed.
f-stop
RATIO OF THE FOCAL LENGTH TO THE DIAMETER OF THE ENTRANCE PUPIL
F/stop; F stop; F number; F-stop; Focal ratio; F-Stop; F-Number; Relative aperture; F stops; T stop; Fstop; Relative Aperture; Working f-number; Tstop; Tstops; T-stops; T-stop; T stops; F-stops; F/number; Half stop; Stop number; T-stop system; F Number; F/; Ƒ-number; Transmission stop; T-number (photography); T number (photography); H stop; H-stops; H-stop; H stops; H number (photography); H-number (photography); F/11
¦ noun Photography a camera setting corresponding to a particular f-number.
ويكيبيديا
F number (chemistry)
F number is a correlation number used in the analysis of polycyclic aromatic hydrocarbons (PAHs) as a descriptor of their hydrophobicity and molecular size. It was proposed by Robert Hurtubise and co-workers in 1977.
