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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Burgess, Dr. Jeremy |
Taille de l’image : | 3874 px × 2961 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |