SEM of diamond stylus in groove of LP record

SEM of diamond stylus in groove of LP record

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Credit: DR. TONY BRAIN/SCIENCE PHOTO LIBRARY.

Caption: Scanning electron micrograph (SEM) of the surface of a long-playing record (L.P.), showing a spherical diamond stylus (suspended below its cantilever arm) sitting in a groove. The L.P. is made by pressing the recording information onto a softened (heated) PVC disc. The stylus sits nicely in the V-shaped groove, and lateral vibrations are picked up by the stylus and transduced by a moving-coil or moving-magnet cartridge into an electrical signal, which passes through an amplifier to be heard on loudspeakers. Magnification: X 13 at 35mm size, X 90 at 8x10- inch size.

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Keywords: common item, familiar object, items, objects, polyvinyl chloride (pvc), record, stylus, technology

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