50.1 MB (50.0 MB compressed)
4802 x 3645 pixels
40.6 x 31.0 cm ⏐ 16.0 x 12.2 in (300dpi)
DR. TONY BRAIN / SCIENCE PHOTO LIBRARY DR. TONY BRAIN / SCIENCE PHOTO LIBRARY
Scanning electron micrograph (SEM) of the surface of a long-playing record (L.P.), showing a spherical diamond stylus sitting in one of the concentric grooves. 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 as the record rotates: these are 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 250 at 35mm size, X 1760 at 8x10-inch size.
Model release not required. Property release not required.