Ernst Chladni,German physicist

Numéro d’image : 11717947
Ernst Chladni,German physicist
Ernst Chladni. Portrait of Ernst Florens Friedrich Chladni (1756-1827),German physicist and acoustics pioneer. He measured the speed of sound by filling organ pipes with different gases and noting the change in pitch. He used a violin bow to vibrate sheets of metal which were clamped in the middle then covered in sand. The sand formed a variety of different symmetrical patterns. These Chladni figures were due to the sand collecting in areas where the plate did not vibrate (nodes); these patterns allowed waveforms to be studied. Chladni also invented two musical instruments,the euphonium and clavicylinder
Licence : Droits gérés
Crédit: Science Photo Library / NEW YORK PUBLIC LIBRARY / JOSEPH MULLER COLLECTION
Taille de l’image : 2600 px × 3402 px
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