closed-ring resonator

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• Split Ring Resonator — A split ring resonator (SRR) is a component part of a negative refractive index material. SRRs are a pair of concentric annular rings with splits in them at opposite ends. The rings are made of nonmagnetic metal like copper and have small gap… …   Wikipedia

• Optical ring resonators — consist of a waveguide in a closed loop coupled to one or more input/output (or bus) waveguides. When light of the appropriate wavelength is coupled to the loop by the input waveguide, it builds up in intensity over multiple round trips due to… …   Wikipedia

• Negative index metamaterials — A negative index metamaterial causes light to refract, or bend, differently than in more common positive refractive index materials. Negative index metamaterials or negative index materials (NIM) are artificial structures where the refractive… …   Wikipedia

• Transformer — This article is about the electrical device. For the toy line franchise, see Transformers. For other uses, see Transformer (disambiguation). Pole mounted distribution transformer with center tapped secondary winding. This type of transformer is… …   Wikipedia

• Fibre optic gyroscope — A fibre optic gyroscope (FOG) is a gyroscope that uses the interference of light to detect mechanical rotation. The sensor is a coil of as much as 5 km of optical fiber.Two light beams travel along the fiber in opposite directions. Due to the… …   Wikipedia

• Vibraphone — Infobox instrument name=Vibraphone names=Vibraharp, Vibes image capt=A typical vibraphone color=#FFEC8B classification=Percussion instrument (Idiophone) range= related= musicians= builders= articles=The vibraphone, sometimes called the vibraharp… …   Wikipedia

• Banjo — For other uses, see Banjo (disambiguation). Banjo A modern 5 string banjo String instrument Hornbostel–Sachs classification 321.322 5 (Composite chordophone sounded by the bare fing …   Wikipedia

• speech — /speech/, n. 1. the faculty or power of speaking; oral communication; ability to express one s thoughts and emotions by speech sounds and gesture: Losing her speech made her feel isolated from humanity. 2. the act of speaking: He expresses… …   Universalium

• percussion instrument — a musical instrument, as the drum, cymbal, triangle, xylophone, or piano, that is struck to produce a sound, as distinguished from string or wind instruments. [1870 75] * * * A musical instrument that is struck (or sometimes shaken or scraped) to …   Universalium

• Flute — The flute is a musical instrument of the woodwind family. Unlike other woodwind instruments, a flute is a reedless wind instrument that produces its sound from the flow of air against an edge.A musician who plays the flute can be referred to as a …   Wikipedia

• wind instrument — /wind/ a musical instrument sounded by the breath or other air current, as the trumpet, trombone, clarinet, or flute. [1575 85] * * * ▪ music Introduction       any musical instrument that uses air as the primary vibrating medium for the… …   Universalium