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SEM of grooves in LP stereo record showing dust

SEM of grooves in LP stereo record showing dust

H100/0091

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27.0 MB (27.0 MB compressed)

3753 x 2516 pixels

31.8 x 21.3 cm ⏐ 12.5 x 8.4 in (300dpi)

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Credit

DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY

Caption

Scanning electron micrograph (SEM) of the grooves of a long-playing (stereo) record, showing particles of dust on the surface. The grooves are cut into a flat disc of polyvinyl chloride. The straightness of the groove varies with the intensity of the music recorded: the straighter the groove the quieter the music, the wavier the groove the louder the music. The stylus travels through the groove picking up the music modulation from the sloping sides. It is transmitted to the cartridge where a piezoelectric crystal or an electromagnet converts vibration into an electrical signal. Magnification: X 30 at 35mm size, X 200 at 8x10-inch size.

Release details

Model release not required. Property release not required.

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