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Polarity - The polarity of an object is, in general, its physical alignment. The term is often used to describe the positive and negative ends of batteries and magnets.

In cell biology, polarity ref. Used . ers to cells not being point-symmetrical in their spatial organization. This is particularly evident for cells organized in single cell layers that separate organs or subcompartments in organ. Used . isms.

In chemistry, molecular polarity refers to the dipole-dipole intermolecular forces between the slightly positive end of one molecule to the negative end of another or the same molecule. Mole...

Ellipsoidal Reflector Spotlight - ERS is an acronym standing for Ellipsoidal Reflector Spotlight. These are sometimes known by their brand names, especially Leko, short for Lekolite, the name given to them by their inventors, Joseph L. Used . evy and Edward Kook. ETC's Source Four has become a very popular ERS throughout the industry, and some people use the term Source Four to refer to spotlights in general. They come in many for. Used . ms, and are the most numerous and important instrument type in use. The flexibility of the ERS allows them to fulfill the bulk of the lighting roles in the theatre, from area lighting to close specials, from l...

Protocol - In computing, a protocol is a convention or standard that controls or enables the connection, communication, and data transfer between two computing endpoints. In its simplest form, a protocol can be . Used . defined as the rules governing the syntax, semantics, and synchronization of communication. Protocols may be implemented by hardware, software, or a combination of the two. At the lowest leve. Used . l, a protocol defines the behavior of a hardware connection.

Protocols should be distinguished from technical standards, which variously specify how to build a computer or related hardware device,...

Moving Light - A moving light truss has a wider opening to accommodate the space required for a moving head light. . Used . . Used . ...

Zoom Flash - A flash with the capability of adjusting the width of its beam to accurately fit the angle of the lens being used.. Used . . Used . ...