focal property

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focal property [′fō·kəl ′präp·ər·dē]

(mathematics)

The property of an ellipse or hyperbola whereby lines drawn from the foci to any point on the conic make equal angles with the tangent to the conic at that point.

The property of a parabola whereby a line from the focus to any point on the parabola, and a line through this point parallel to the axis of the parabola, make equal angles with the tangent to the parabola at this point.

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No references found			Foamed Ceramics foamed concrete foamed plastic foamed polystyrene foamed slag foamed-in-place insulation foamed-in-situ plastics foamflower foaminess foaming Foaming Agent Foard County Foawr FOB FOCA FOCAL focal adhesion plaque focal chord focal distance focal infection focal length focal lines focal plane focal point focal power focal property focal radius focal ratio focal seizure focal spot focal-plane array Focal-Plane Shutter Foch Foch space Foch, Ferdinand Focillon, Henri FOCIS Fock, Jeno Focke-Wulf 190 FOCL focometer Focsani Focus focus control FOCUS Desktop FOCUS Fusion focus group focus lamp Focus of Mass Destruction focus projection and scanning focus wave mode			Focal plane array Focal Plane Assembly Focal Plane Assembly Shroud Focal Plane Electronics Focal Plane Instrument Focal Plane Package Focal Plane Science Instrument Focal plane shutter Focal Plane Structure Focal Plane Structure Simulator Focal Plane Target Fixture focal planes focal planes focal planes focal point focal point focal point focal point Focal Point Array Focal Point of Maidenhead focal point of the complaint Focal Point on Disaster Evaluation Focal Point Review Focal points Focal points Focal points Focal points focal power focal power Focal Proliferative Endo and Extracapillary Glomerulonephritis focal property focal radius focal ratio focal ratio focal ratio focal reaction Focal Renal Cortical Retention focal ring cataract focal ring cataract focal ring cataract focal ring cataract Focal Segmental Endocapillary Proliferation Focal Segmental Glomerular Sclerosis and Hyalinosis Focal Segmental Glomerulersclerosis Focal Segmental Glomerulonephritis focal segmental glomerulosclerosis focal segmental glomerulosclerosis focal segmental glomerulosclerosis Focal Segmental Sclerosing Glomerulopathy Focal Segmentary Glomerular Hyalinosis focal seizure focal seizure focal seizure focal seizure focal seizure disorder Focal seizures Focal seizures Focal seizures focal spot focal spot focal spot

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