32.8 MB (2.5 MB compressed)
3874 x 2961 pixels
32.8 x 25.1 cm ⏐ 12.9 x 9.9 in (300dpi)
DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY
False-colour scanning electron micrograph of a diamond stylus travelling through the grooves of a long-playing, stereo record. The grooves are cut into a flat disc of polyvinyl chloride. The groove varies with the intensity of the music: the straighter the groove the quieter the music, the wavier the groove (as here) the louder the music. The stylus picks up the music modulation from the sloping sides & transmits it to the cartridge, where a piezoelectric crystal or an electromagnet converts the vibration into an electrical signal. Although thoroughly cleaned, this needle is encrusted with dirt. Magnification: x30 at 35mm size, x50 at 6x4.5cm size. Purple & yellow stylus on red record. Reference: MICROCOSMOS, figure 9.16, page 182.
Model release not required. Property release not required.