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An illustration of some of the optical devices available for laboratory work in England in 1858. An optical instrument is a device that processes light waves (or photons), either to enhance an image for viewing or to analyze and determine their characteristic properties.
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The bonang is an Indonesian musical instrument used in the Javanese gamelan. [1] It is a collection of small gongs (sometimes called "kettles" or "pots") placed horizontally onto strings in a wooden frame (rancak), either one or two rows wide.
Phase shift through a beam splitter with a dielectric coating. Beam splitters are sometimes used to recombine beams of light, as in a Mach–Zehnder interferometer.In this case there are two incoming beams, and potentially two outgoing beams.
The reyong (also spelled reong) is a musical instrument used in Balinese gamelan.It consists of a long row of metal gongs suspended on a frame. In gamelan gong kebyar, it is played by four players at once, each with two mallets.
Camera lucida in use. A camera lucida is an optical device used as a drawing aid by artists and microscopists.It projects an optical superimposition of the subject being viewed onto the surface upon which the artist is drawing.
The slenthem (also slentem or gender panembung) is an Indonesian metallophone which makes up part of a Javanese gamelan orchestra. The slenthem is part of the gendér family. [1]
Schematic drawing of a hydrometer. The lower the density of the fluid, the deeper the weighted float B sinks. The depth is read off the scale A.. A hydrometer or lactometer is an instrument used for measuring density or relative density of liquids based on the concept of buoyancy.