About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 65. Chapters: Dimensionless quantity, P clet number, Mach number, Prandtl number, Strouhal number, Nusselt number, Grashof number, Abbe number, Fine-structure constant, Power number, Rayleigh number, F-number, Deborah number, Parts-per notation, Correlation and dependence, Drag coefficient, Biot number, Poisson's ratio, Darcy-Weisbach equation, Reynolds number, Rockwell scale, Froude number, Shore durometer, Rossby number, Gravitational coupling constant, Supersonic airfoils, Leaf Area Index, Pressure coefficient, Brinell scale, Knudsen number, Lift coefficient, Womersley number, Dean number, Richardson number, Turbulent Prandtl number, Ursell number, Keulegan-Carpenter number, E tv?'s number, Taylor number, Sherwood number, West number, Stokes number, Schmidt number, Weber number, Shields parameter, Lindemann index, Magnetic Reynolds number, Damk hler numbers, Bejan number, Goodness factor, Van 't Hoff factor, Nelson complexity index, Ekman number, Sinuosity, Euler number, Cauchy number, Ohnesorge number, Archimedes number, Brinkman number, G rtler vortices, Chandrasekhar number, Stanton number, Rouse number, Morton number, Lewis number, Cunningham correction factor, Galilei number, Beale number, Weissenberg number, Roshko number, Graetz number, Fourier number, Atwood number, Magnetic Prandtl number, Laplace number, Marangoni number, Capillary number, Sticking coefficient, Blake number, Hatta number, Hagen number, Electromechanical coupling coefficient, Eckert number, Ericksen number, Lockhart-Martinelli parameter, Ruark number, Friction factor. Excerpt: In optics, the f-number (sometimes called focal ratio, f-ratio, f-stop, or relative aperture) of an optical system expresses the diameter of the entrance pupil in terms of the focal length of the lens; in simpler terms, the f-number is the focal length divided by the "effective" ...
