relative aperture
41f — • atomic orbital with angular momentum quantum number 3; • farad; • fasting; • father; • female; • femto ; • fiber, fibrous; • fingerbreadth; • fission; • flexion; • fluid; • focal; • foot; • form, forma; • formula; • fostered [experimental… …
42Environmental scanning electron microscope — Wool fibers imaged in an ESEM by the use of two symmetrical plastic scintillating backscattered electron detectors …
43Mathematical descriptions of physical laws — For worded descriptions and criteria of physical laws, see Physical law. For the nomenclature used see Physical quantity and Defining equation (physics). Physical laws are often summarized by a single equation, or at least a small set of… …
44Diffraction — Computer generated intensity pattern formed on a screen by diffraction from a square aperture …
45eye, human — ▪ anatomy Introduction specialized sense organ capable of receiving visual images, which are then carried to the brain. Anatomy of the visual apparatus Structures auxiliary to the eye The orbit The eye is protected from mechanical injury… …
46ESEM — stands for environmental scanning electron microscope. This is a scanning electron microscope (SEM) that allows a gaseous environment in the specimen chamber. Whereas all conventional microscopes operate in vacuum, the ESEM has added a new… …
47light — light1 lightful, adj. lightfully, adv. /luyt/, n., adj., lighter, lightest, v., lighted or lit, lighting. n. 1. something that makes things visible or affords illumination: All colors depend on light. 2. Physics …
48Cathode ray tube — Cutaway rendering of a color CRT: 1. Three Electron guns (for red, green, and blue phosphor dots) 2. Electron beams 3. Focusing coils 4. Deflection coils 5. Anode connection 6. Mask for separating beams for red,… …
49Sonar — This article is about underwater sound propagation. For atmospheric sounding, see SODAR. For other uses, see Sonar (disambiguation) …
50Nikon F-mount — The Nikon F of 1959 embodies the original F mount. Type Bayonet External diameter 44 mm Tabs 3 Flange 46.5 …
