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L-band is the frequency band from 390 to 1550 Mhz employed in radar.
 Research L-band
Lac is a resinous substance secreted by an insect, and from which materials such as shellac are derived.
Research Lac
Originally, lacquer was a thick emulsion derived from the sap of a certain native tree in China and used as a varnish. The term is now applied to almost any varnish.
Research Lacquer
Lactic acid or 2-hydroxypropanoic acid, is an organic acid formed by certain bacteria during fermentation. It also occurs in the muscles when they are exercised vigorously. It is a colourless, almost odourless liquid. It is used in food preservation and pharmaceuticals.
Research Lactic Acid
A lactoscope is an instrument for measuring the amount of cream in milk.
Research Lactoscope
Lactose is a sugar found in solution in milk. It is the combination of glucose and galactose.
Research Lactose
Ladanum (labdanum) is a gum resin extracted from plants of the genus Cistus and used in perfume.
Research Ladanum
Laevulin is a polysaccharide occurring in the tubers of certain helianthus plants.
Research Laevulin
In astronomy, the Lagrangian point is one of five points in the plane of revolution of two bodies in orbit around their common centre of gravity, at which a third body of negligible mass can remain in equilibrium with respect to the other two bodies.
Research Lagrangian Point
Lake colours are pigments prepared by precipitating soluble organic dyes on to a mineral base such as alumina, Paris white or China clay and fixing them chemically to form an insoluble compound. Lake colours were widely used during the Middle Ages but tend to fade when exposed to sunlight.
Research Lake Colours
Lamarckism is the theory of organic evolution proposed by Jean Lamarck, based on the principle that characteristics of an organism modified during its lifetime are inheritable.
Research Lamarckism
The lambert is the unit of luminance (the light shining from a surface), equal to one lumen per square centimetre. In scientific work the candela per square metre is preferred.
Research Lambert
Laminarin is a carbohydrate, consisting of repeated glucose units, that is the main storage product of brown algae.
Research Laminarin
A lamp is a vessel filled with oil and fitted with a wick which is then used to provide light. The term has come to apply to any device which provides illumination, including electric lamps.
Research Lamp
Lamp black is a black pigment consisting of free carbon produced by the incomplete combustion of waste coal-tar products. Lamp black is not such an intense black as carbon black, but produces a fine bluish-grey when reduced with white.
Research Lamp Black
Lampblack is a pigment derived from oil and resin soot.
Research Lampblack
Lanolin is a wax derived from sheep's wool. It consists of cholesterol and isocholesterol, isomeric compounds of an alcoholic constitution.
Research Lanolin
LANSpool is a software utility that lets you share locally attached printers over a Novell NetWare local area network. Since NetWare allows only five printers to be attached directly to the server, a utility such as
LANSpool can be an inexpensive way to add printers to a Novell network. LANSpool provides users with a means to locate printers conveniently. LANSpool lets you connect networked printers to any PC on the LAN. These can be dedicated as print servers, or non-dedicated and serve as workstations as well.
Research LANSpool
The lanthanides are a group of 15 elements.
Research Lanthanide
Lanthanum is a rare metal lanthanide element with the symbol La. It was discovered in the oxide of cerium by Mosander in 1839.
Research Lanthanum
Lap-Link III is a data migration product that takes a different approach from most other products. The package is ideally suited to those who find DOS commands cryptic, since
Lap-Link III presents users with a completely menu-driven operation. Unlike other data migration products that only operate as DOS device drivers, Lap-Link III can perform lightning fast file transfer from one format to another without its optional device driver being installed.
Lap-Link IIl's unique split-screen design helps you keep track of what files you are working with. You can even tag several files or use wildcards when tagging files marked for transfer.
Research Lap-Link
The laryngoscope is an instrument consisting of a concave mirror, by which light is thrown upon a small plane mirror placed in the posterior part of the cavity of the mouth. It is used in the examination of the vocal cords and the interior of the larynx. The laryngoscope was invented by Manuel Garcia in 1855.
Research Laryngoscope
Laser is an acronym for Light amplification by stimulated emission of radiation. It is a device producing an intense narrow beam of light.
Research Laser
In computing, a latch is a simple type of flip-flop, capable of temporarily storing a single bit of data.
Research Latch
Latches version 4 is an access control product for remote access or the office allowing increased security for data stored on a computer.
Research Latches
In computing, latency is the time taken for the start of a given sector of data on a storage disk or drum to reach the read/write head. The smaller the latency value, the faster data is transferred to and from the storage device.
Research Latency
In chemistry, latent heat is the heat absorbed in the changing of a substance from solid to liquid, or from a liquid to a gas. The latent heat of vaporisation of a substance is the quantity of heat required to change unit mass of the substance from the liquid to the vapour state without change of temperature. The latent heat of fusion of a substance is the quantity of heat required to change unit mass of the substance from the solid to the liquid state without change of temperature.
Research Latent heat
Latex is a milky liquid found in many plants which exudes when the plant is cut and coagulates on exposure to the air. A few latexes are used to produce rubber. Artificial latex is a water dispersion of reclaimed rubber, and resemebles natural latex but is softer and tackier.
Research Latex
A lathe is a machine used for turning wood, metal and other materials by rotating the article against tools which cut it to shape.
Research Lathe
Latin-1 (ISO 8859-1) is one of the ISO 8859 computer character sets. It covers most Western European languages such as Albanian, Catalan, Danish, Danish, Dutch, English, Faeroese, Finnish, French, German, Galician, Irish, Icelandic, Italian, Norwegian, Portuguese, Spanish and Swedish but lacks the ligatures Dutch ij, French oe and the old-style German quotation marks. It is the base character set of HTML.
Research Latin-1
Latin-2 (ISO 8859-2) is an ISO 8859 computer character set supporting most Latin-written Slavic and Central European languages such as Czech, German, Hungarian, Polish, Romanian, Croatian, Slovak and Slovene.
Research Latin-2
Latten is a yellow alloy of copper, zinc, lead and tin used for making monumental brasses and church candlesticks.
Research Latten
Lauramide DEA is a white, waxy, non-ionic, artificial chemical used in shampoos, bubble baths and detergents as a surfactant and foam-builder.
Research Lauramide DEA
The law of flotation is an expression of Archimedes' principle applied to a special case and states that: A floating body displaces its own weight of the fluid in which it floats.
Research Law of Flotation
The law of the conservation of momentum is a principle arising from Newton's second and third laws of motion and states that: When two or more bodies act upon another, their total momentum remains constant, provided no external forces are acting.
Research Law of the Conservation of Momentum
The Lawrence tube is a form of picture tube for colour television, having a single electron gun, the beam from which scans the luminescent screen in horizontal lines, each line consisting of three closely spaced lines of three phosphors producing red, green and blue luminescence respectively. The beam is deflected to the line of appropriate colour by information contained in the signal waveform.
Research Lawrence Tube
Lawrencium is an artificial radioactive element with the symbol Lr.
Research Lawrencium
The exact relationship between the angles of incidence and refraction were discovered by Willibrod Snell, professor of mathematics at Leyden University in 1621. Law 1 states: The incident and refracted rays are on opposite sides of the normal at the point of incidence and all three are in the same plane. Law 2 (Snell's Law) states: The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant.
Research Laws of Refraction
LBE Web Helpdesk is a program for the PC designed to minimize the number of calls that a help desk receives by allowing the users to create and monitor their help-desk jobs using a standard Web browser. Help-desk operators can respond from anywhere that has Internet access. It uses industry- standard Web servers that are freely available from Microsoft and can run on Windows 95/98/NT machines. Deployment issues are minimal, as the application isn't installed on users' machines and they can access the help desk using most modern Web browsers
Research LBE Web Helpdesk
Lead is a soft, malleable, metallic element with the symbol Pb. It occurs in many ores, the most important of which is galena. It is a very dense metal, and is used as a shield in environments where radiation abounds, such as x-rays and the nuclear industry.
Research Lead
Lead acetate (sugar of lead) is a compound used as a drying agent in oil-based paints.
Research Lead Acetate
Leaded zinc is a lead-based pigment consistingof zinc oxide and basic lead sulphate. Leaded zinc possesses good weathering propeties and has greater opacity than zinc oxide, but its colour is not so good.
Research Leaded Zinc
Lecithin is a lipid containing nitrogen and phosphorus. It forms a vital part of plant and animal cell membranes. It is used as an emulsifier in foods, but is a perfectly natural additive.
Research Lecithin
The Leclanche Cell is a primary electrical cell generating an e.m.f. of 1.5 volts. The Leclanche Cell consists of a carbon rod positive electrode surrounded by an intimate mixture of carbon and manganese dioxide, the depolarizer, contained within a porous pot; an electrolyte of an aqueous solution of ammonium chloride, and a zinc rod negative electrode. The Leclanche Cell was functional at low currents, but if a large current was drawn hydrogen evolved and tended to cover the carbon electrode, none-the-less the Leclanche Cell was the fore runner of modern zinc carbon batteries.
Research Leclanche Cell
Lemmy is a text editor for the Windows operating system that combines the familiar look and feel of the Unix VI editor with excellent Windows integration, including a full GUI interface, unlimited Undo/Redo, large file support, editable EX history, online edit recovery, customisable menus, file type contexts, and custom colour selection. Syntax highlighting plug-ins include C/C++, HTML, Java, Perl, Tcl/Tk, DOS BAT/CMD, SQL, Fortran, and InstallShield RUL files.
Research Lemmy
Lemon yellow is a very pale yellow pigment used primarily as an artists's colour, made by precipitating barium chloride with sodium bichromate.
Research Lemon Yellow
In nuclear physics, a lepton is any member of a class of charged or uncharged elementary particles of small mass, such as an electron, positron, neutrino, tau; or a member of the muon family (muon, negative muon, and muon neutrino). Each member of the lepton class has an antiparticle. Although all leptons are relatively light, they are not alike. The electron, for example, carries a neutral charge, but is indivisible; the muon, also neutral, has a mass many times greater than that of an electron and can be broken down into smaller particles.
Leptons interact with other particles because of the weak force and gravitational forces.
Research Lepton
Leucosin is a toxic albumin that can be extracted from the oil expressed from the seeds of wheat and some other grains.
Research Leucosin
A lever is a simple machine, usually consisting of a rigid bar or rod, designed to rotate about a fixed point called the fulcrum. The effect of any force applied to a lever is to rotate the lever about the fulcrum. The rotational force is in direct proportion to the distance between the fulcrum and the applied force. For example, a mass of 1 kg, two metres from the fulcrum, can balance a mass of 2 kg at a distance of one metre from the fulcrum. In the crowbar, one type of lever, a relatively small effort is applied at the end farthest from the fulcrum to lift a heavy weight that is close to the fulcrum. Many other common tools and instruments (including the wheel barrow and the nutcracker) utilize the principle of the fulcrum.
Research Lever
The lewis was a contrivance for lifting stones which was used by the ancient Romans. It received its name from a French architect who revived the instrument and named it after his master Louis XIV. The lewis consists of two dovetail tenons, which are expanded by a key in a dovetail mortise in the stone, and shackled to a hoisting-chain. The dovetail pieces are first inserted, and then forced apart by the middle key, so as to occupy the undercut portion of the mortise. All three are then shackled to the lifting-chain.
Research Lewis
The Leyden jar was one of the earliest and simplest forms of electric capacitor. It was discovered independently about 1745 by the Dutch physicist Pieter van Musschenbroek of the University of Leyden and Ewald Georg von Kleist of Pomerania. The original Leyden jar was a stoppered glass jar containing water with a wire or nail extending through the stopper into the water. The jar was charged by holding it in one hand and bringing the exposed end of the wire into contact with an electrical device. If contact was broken between the wire and the source of electricity, and the wire then touched, a discharge took place that was experienced as a violent shock. The present-day Leyden jar is coated with tin-foil on the inside and outside. Electrical contact is made with a brass rod that punctures the stopper of the jar and is connected to the inside layer of metal by a chain. A complete discharge occurs when the two coatings are connected with each other by a conductor. The Leyden jar is still frequently used in laboratories for
demonstration and experimental purposes.
Research Leyden Jar
Light is electromagnetic radiation detectable by the eye and of wavelengths between approximately 4000 and 7000 Angstrom units (380 and 780 nano-meters). The perceived different colours are represented by different wavelengths ranging from violet at 3600 - 4300 Angstroms to red at 6470 - 7600 Angstroms.
Research Light
Light-year is an astronomical unit of measurement, being the distance travelled by light in the course of one year, which is 6,000,000,000,000 miles. The distance of stars is usually expressed in light-years or in parsecs (a parsec being 3.2616 light-years).
Research Light-Year
Lightning is the discharge of static electricity built up in clouds by the movement and rubbing of ice and water particles at speeds of around 100 mph within the cloud which cause electrons to be split off from the ice, and scattered randomly. The static electricity builds up within the cloud, until eventually it releases itself, at first arcing between clouds and then as it grows stronger to earth as a low voltage, invisible charge which returns from the earth to the cloud as a powerful stream of lightning. Lightning is five times hotter than the sun, and this heat causes the surrounding air to explode with loud bangs (heard as thunder).
Research Lightning
A lightning conductor is an instrument by means of which either the electricity of the clouds, the cause of lightning, is conducted without explosion into the earth, or the lightning itself is received and conducted quietly into the earth or water without injuring buildings, ships, etc.
The lightning conductor was invented by Benjamin Franklin about 1752, and met with speedy general adoption, the first conductor in England being erected in 1762. It usually consists of a stout iron or copper rod with one or more points at the top, the lower end being metallically connected with thick strips of copper which are carried into the ground to a considerable depth and terminated, if possible, in water or in wet earth. Various other forms of conductors have been introduced, such as a conductor consisting of metallic strips joined together, a conductor of copper wires intertwined with iron rods, a conductor consisting of a metallic strip forming a tube with spiral flanges.
Copper lightning conductors are a familiar and easy to recognise site on tall buildings. The copper quickly oxidising it takes on a pale green appearance and contrasts with the brickwork, stonework or concrete of the surrounding structure.
Research Lightning Conductor
Lime blue was originally a term for the pigment copper blue, by the mid-20th century the term applied to a very cheap form of ultramarine blue pigment, made by grinding the lowest grade pigment with terra alba.
Research Lime Blue
Limonene is a terpene occurring in the oil of lemon, lime, lavender, caraway and bergamot.
Research Limonene
Lincrusta was a substance used in ornamental plastic material around 1900. It was invented by James Walton and was composed of cellulose paper and pulverised cork, compressed, soaked with oil and resin, and while in a semi-viscous state stamped with dies to give an impression in low relief. It was non-absorbent, very elastic and flexible and resembled prepared leather and woods.
Research Lincrusta
In an astronomical instrument, such as a telescope or transit instrument, a line of collimation is the straight line which passes through the centre of the object-glass and intersects at right angles a system of spider-threads placed at the focus of the eye-piece. The proper adjustment of the line of collimation of the instrument is necessary to accurate observation of the time at which movements of the heavenly bodies take place.
Research Line of Collimation
Link baiting is a technique used by web sites to attract other web sites to link to their page or pages, with a view towards encouraging a higher position within search engine results pages. A typical technique for link baiting is posting controversial material.
Research Link Baiting
A link checker is a computer program that checks links within an HTML document. Xenu's Link Sleuth is a free link checker for the Windows operating system.
Research Link Checker
Linoleic acid is a polyunsaturated fatty acid present as a glycerol ester in drying oils such as linseed oil and poppy oil. It is a yellow oil which oxidises to a tough varnish on exposure to the air, and is essentiual in the human diet.
Research Linoleic Acid
Linseed oil is a pale yellow vegetable drying oil obtained by crushing the seed pods of the flax plant. Linseed oil was formerly much used in binding paint, the manufacture of varnish and the treatment of wood - particularly cricket bats.
Research Linseed Oil
Linux is a free computer operating system first developed and released by Linus Torvalds in 1991. Basically Linux is a form of the UNIX operating system, and is used extensively on 80x86 processor family computers, and is also available for many other CPUs. Advocates of Linux claim it to be a fast and stable operating system, and it is widely used for computer file servers, particularly on the world wide web.
Research Linux
A lipid is an organic substance that is soluble in solvents such as alcohol but not in water.
Research Lipid
Lipowitz's alloy is a fusible alloy consisting of 50 percent bismuth, 26.5 percent lead, 13.3 percent tin and 10.2 percent cadmium.
Research Lipowitz's Alloy
LISP (from 'LISt Processing language', but mythically from 'Lots of Irritating Superfluous Parentheses') is a computer programming language. It is a language based on the ideas of (a) variable-length lists and trees as fundamental data types, and (b) the interpretation of code as data and vice-versa. It was Invented by John McCarthy at MIT in the late 1950s, and is actually older than any other high-level language still in use except FORTRAN. Accordingly, it has undergone considerable adaptive radiation over the years; modern variants are quite different in detail from the original LISP 1.5.
Research LISP
Litharge is lead monoxide (PbO). It is a toxic red or yellow coloured substance prepared by oxidising lead in a current of air at a high enough temperature for the oxide to be melted as it forms. Litharge was used as a drier for paint and in the production of boil oil and terebine.
Research Litharge
Lithium is a metal element with the symbol Li.
Research Lithium
Lithography is a printing process invented by Senefelder in 1796.
Research Lithography
Lithopone is a mixture of zinc sulphide and barium sulphate used as a white pigment in paints. It is a very pure white with a high degree of opacity, ranking next to titanium white in opacity. Lithopone disintegrates rapidly when exposed, and as such is only used for interior paints.
Research Lithopone
Litmus is a dye derived from certain lichens and used to test pH (acidity and alkalinity).
Research Litmus
The litre is a metric liquid measure. One litre is the volume of one kilogram of pure water at the temperature of its maximum density, four degrees Celsius.
Research Litre
Litzendraht (Litz) is a composite conductor designed for use in high-frequency circuits, and composed of a large number of fine wires, each separately insulated, and interwoven in a special way. This construction ensures a high ratio of surface area per unit length to cross-sectional area, and thus reduces the skin effect.
Research Litzendraht
In computing, load average is the average usage of system capacity. The term is typically used in Unix/Linux systems where CPU load is reported by the monitoring application 'top' and also recorded in the file /proc/loadavg. The CPU load is reported as the average for the past 1, 5 and 15 minutes and can give a system operator an idea of how much the processor is being utilised, or even overworked.
Research Load Average
The Lobster 320 is a budget priced dual band flip mobile phone featuring a 0.3 megapixel digital camera and polyphonic ringtones for personalisation. Intended as a fairly simple, budget mobile phone the Lobster 320 also includes an alarm, calendar and calculator facility along side the inevitable games.
Research Lobster 320
A localizer is a form of radio beacon used in instrument landing systems for aircraft. It is located about 230 metres beyond the stop end of an airfield runway and radiates two signals of different frequencies from two aerials whose polar diagrams overlap in such a way that their signals are of equal strength along the centre of the runway. In the receiving equipment fitted in the aircraft the two signals are applied to a centre-zero instrument. When the indicating pointer of the instrument is in the centre (zero) position the pilot knows that he is correctly aligned with the runway.
Research Localizer
Logo is a computer programming language designed to teach mathematical concepts. It was developed in the early 1970s in America.
Research Logo
Long Waves are radio waves having wavelengths between 1000 and 10,000 metres, corresponding to frequencies from 300 kHz down to 30 kHz.
Research Long Waves
Loran is a radio navigation system of the hyperbolic type and developed in America chiefly for long- range navigation over the sea. Chains of transmitters radiate high power 50 micro-second pulses on frequencies in the order of 2 Mhz.
Research Loran
Lotus Freelance is an integrated-graphics program that gives charting capabilities and lets you add text and graphic images to presentations. With the various tools provided, you can create presentations that include organization charts, text charts, logos, diagrams, business graphs, and free-form drawings. Lotus Freelance includes a Portfolio feature that assists you in planning, organising, previewing, and printing multiple files. If you have created graphs within your spreadsheet, Freelance can enhance them with symbols, text, diagrams, and icons. Graphics may be edited by changing the size, colour, fill pattern, line type, and font. Objects may be copied, moved, replicated, deleted, undeleted, turned, flipped, and joined into a single symbol which can then be edited as a single object. Freelance automatically scales, sizes, and formats its charts. You can create high-quality graphics by using Freelance's drawing aids such as grids, rulers, over 40 templates, or by merging any of over 700 library symbols into any diagram or
drawing. You can even create special symbols such as your company logo. Freelance's unique drawing area lets you keep frequently used symbols on one page and import them to your graph on the other page with a single keystroke. Freelance is similar to drawing programs because it is object-oriented rather than a bit-mapped. It recognizes the pieces of your image as unique objects and manipulates and modifies objects in a way similar to stand-alone drawing programs. For example, Freelance understands that a pie chart created in Lotus 1-2-3 is made up of individual slices that can be edited individually. The product has its own basic charting capabilities for creating 12 chart types including pie, bar, line, mixed, exploded, table, bar-line, XY scatter, high-low-close text, and multiple charts. Data entry is consistent across all chart types. A built-in chart composition system automatically adjusts data driven chart layouts to accommodate data, even when it changes. Freelance is a WYSIWYG program that lets you accurately preview graphics files
on-screen. The WYSIWYG preview displays colours and font attributes, as well as true placement of graphics elements on the page. Freelance includes Datalinks and Visible Data Import that creates a lasting link between a chart form and a spreadsheet, database, ASCII, or SYLK file. When a chart file is retrieved, you can choose to have it automatically updated with the latest data for the source file.
Research Lotus Freelance
Lotus Notes is a workgroup computing environment for the PC. With Notes, colleagues can collaborate regardless of technical, organizational, or geographical boundaries. Notes consists of two primary programs: the Notes server and the Notes workstation. The Notes server provides services like storage of shared databases and mail routing to Notes workstation users and other Notes servers. The Notes workstation communicates with Notes servers so that users can use shared databases and read and send mail. Notes Designer is an enhanced Notes client that includes special support for developers who are building applications for delivery via the Domino server to both Notes clients and Web browsers. The Domino server supports HTTP, SSL, SMTP, MIME, POP3, IMAP, LDAP, and NNTP. It is available in two configurations: the Lotus Domino Mail server, which is a complete messaging server, and the full Domino server, which combines Domino Mail server messaging functionality with the power of Internet and intranet application development.
Research Lotus Notes
Lotus SmartCenter is an easy to use, highly customisable Internet information centre for the PC. SmartCenter helps minimize repetitive Internet and intranet browsing by providing one-click access to frequently visited I-net information sources, without launching a separate Web browser. SmartCenter also integrates with Lotus Organizer Calendar, Contacts and To Do sections, providing quick access to PIM data
Research Lotus SmartCentre
Lotus Symphony is a multi-function, fully integrated business software package which provides users with the ability to create documents which mix text, numeric data, and graphs and produce presentation quality output. It includes a windowing capability, macros, and a command programming language. Symphony's powerful word processor includes an 80,000-word add-in dictionary and a text- outliner to help you organise ideas. There is automatic paragraph reformatting and wildcard characters may be used to assist in search-and-replace tasks. Symphony's database is form-oriented. You can insert, move, edit, and delete fields directly from the form environment. There are several database statistical functions that find averages, totals, and maximum values for records meeting selected criteria. The communications function accesses information from mainframes, minis, or other personal computers. Symphony comes with pre-configured settings for many on-line information services. Symphony's spreadsheet is based on that of Lotus 1-2-3. In addition,
the Viewer function lets you browse and retrieve files from within Symphony. Symphony files are fully compatible with Lotus 1-2-3 files and have a similar interface. The product includes several add-ins. Allways lets you add fonts, shading, boxes, and lines to a spreadsheet. Magellan Viewer makes it easy to browse, retrieve, or link files. @BASE lets you create, edit, and manage dBase files stored on disk from within Symphony, or access multiple database files simultaneously.
Research Lotus Symphony
The Lowe HF-125 was a British made, budget priced and performing general coverage receiver made between 1987 and 1988 and providing coverage from 30 kHz to 30 Mhz in AM, SSB and CW modes.
Research Lowe HF-125
The Lowe HF-150 was a British made general coverage receiver made between 1992 and 1999 and providing coverage from 30 kHz to 30 Mhz in AM and SSB modes with better performance than the earlier Lowe HF-125.
Research Lowe HF-150
Lpr is the Unix print program that uses a spooling daemon to print the specified files when facilities become available.
Research Lpr
Lptest is a computer program for the Unix platform that writes traditional 'ripple test' patterns to the standard output. In 96 lines, this pattern will print all 96 printable ASCII characters in each position. Although originally created to test printers, Lptest is also quite useful for testing terminals, driving terminal ports for debugging purposes, or any other task where a quick supply of random data is needed.
Research Lptest
Lucite is a trade name for polymethyl methacrylate.
Research Lucite
The Lumen the unit of luminous flux, equal to the amount of light emitted per unit solid angle by a standard international candle.
Research Lumen
Luminescence is the emission of light as the result of any stimulus other than heat. If the stimulus is heat the emission of light is termed incandescence.
Research Luminescence
Luminous flux is the amount of light emitted from a light source.
Research Luminous flux
Luna 10 was a Soviet satellite launched in March 1966, and was the first artificial satellite placed in orbit around the Moon. Luna 10 carried scientific equipment for measuring such data as the Moon's magnetic field and infra-red emissions from the Moon's surface.
Research Luna 10
Luna 12 was a Soviet satellite launched in October 1966 and placed into orbit around the Moon transmitting pictures of the Moon's surface and data about the Moon's gravitational field and information about the gamma radiation of the Moon's surface and information about micro-meterorites near the Moon.
Research Luna 12
Luna 13 was a Soviet space probe launched in December 1966 which landed on the Moon's surface in the Ocean of Storms and transmitted back data about the strength and density of the Moon's surface as well as television pictures of the Moon's surface.
Research Luna 13
Luna 9 was a Soviet space probe launched in January 1966 and the first probe with a working instrument pack to soft-land on the surface of the Moon. Luna 9 landed in the Ocean of Storms and for three days transmitted television pictures of the moon's surface to earth.
Research Luna 9
A lunar eclipse occurs when the Earth passes between the Moon and Sun,
Lunar eclipses are either total or partial, depending upon whether the Moon moves completely into the Earth's shadow or not. Eclipses do not happen once a month because the Earth's orbit about the Sun and the Moon's orbit about the Earth are not in the same plane.
Research Lunar Eclipse
Lutetium is a metal element with the symbol Lu.
Research Lutetium
The lux is the SI unit of illuminance or illumination (the light falling on an object). It is equivalent to one lumen per square metre or to the illuminance of a surface one metre distant from a point source of one candela.
Research Lux
Lycra is a synthetic fibre introduced in 1958 by Du Pont of Delaware, USA. Lycra is elastic, abrasion resistant and has stretch and recovery powers. It is extensively used in the clothing industry.
Research Lycra
Lye is an alkali solution used for washing, and the basis of all soap - which is fat saponified in lye to form a solid bar, as distinct from a liquid. Traditionally lye was made by mixing wood ash with water, to form an alkali solution based on potash. Today it's more usual commercially for sodium hydroxide (caustic soda) to be used.
Research Lye
Lynx is a computer program for accessing the World Wide Web. It will display Hypertext Markup Language (HTML) documents containing links to files residing on a local system, as well as files residing on remote systems running Gopher, HTTP, FTP, WAIS, and NNTP servers.
Lynx can be used to access information on the World Wide Web, or to build information systems intended primarily for local access. Because it displays in a simple text mode (character-cell display), Lynx is popular with the visually impaired who can use it with other programs that convert screen display into spoken language played through a computer sound-system. It should be noted that
Lynx ignores CSS instructions.
Research Lynx
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Abbreviations
SciTech
