Record Needle, SEM

Record Needle, SEM

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Credit: Ted Kinsman/SCIENCE PHOTO LIBRARY

Caption: Coloured scanning electron micrograph (SEM) of the needle (stylus) of a record player in a groove on a record. A record is used to store sound. It is produced by a machine with a head which vibrates in time to the sound being recorded. This cuts a groove in the record which varies according to the vibrations. A needle can then reproduce these vibrations as it runs along the groove and these, when amplified, produce the original sound. This is a stereo record. The needle in contact with the record is a LP needle, or a long play needle designed for stereo use. This record is designed for 45 RPM, and the spare needle pointing up is a 78 RPM needle (note the different angles).

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Keywords: 45 rpm, 78 rpm, acoustics, audio, colorized, coloured, enhanced, enhancement, false-coloured, gramophone, groove, long plan needle, lp, lp needle, mono, music, needle, playing, playing a record, record, record groove, record player, record playing, scanning electron micrograph, scanning electron microscope, sem, sound, stylus, technological, technology, vibration sounds, vinyl

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