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SEM of grooves in LP record

SEM of grooves in LP record

H100/0098

Rights Managed

52.9 MB (6.1 MB compressed)

5218 x 3543 pixels

44.2 x 30.0 cm ⏐ 17.4 x 11.8 in (300dpi)

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Credit

DR. TONY BRAIN / SCIENCE PHOTO LIBRARY DR. TONY BRAIN / SCIENCE PHOTO LIBRARY

Caption

Scanning Electron Micrograph (SEM) of the surface of a long-playing record (L.P.), showing a plan view of 10 grooves. The L.P. is made by pressing the recording information onto a softened (by heating) PVC disc. The straight groove (3rd from right) indicates an almost continuous note. The white flecks are particles of dust. 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 220 at 10x8 size, X 30 at 35mm size.

Release details

Model release not required. Property release not required.

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