alb5414476
Johann Philipp Reis, Telephone,1860
| Partager |
|---|
 Pinterest |
 Twitter |
 Facebook |
 Copier le lien |
 Email |
|
Ajouter à une autre Lightbox |
|
Ajouter à une autre Lightbox |
Avez-vous déjà un compte? S'identifier
Vous n'avez pas de compte ? S'inscrire
Acheter cette image.
Sélectionnez l'usage:
Titre: Johann Philipp Reis, Telephone,1860
Légende: Voir la traduction automatique
The Reis telephone was a rudimentary telephone invented by Johann Philipp Reis (German, 1834-1874). First built in 1860, it was based on the principle of magnetostriction. Wire coiled around iron cores and needles caused contraction when a current flowed, producing an audible click in a resonator. However, the sounds were faint, and there was little interest in the invention. The practical development of the telephone was achieved by others, such as Alexander Graham Bell.
The Reis telephone was a rudimentary telephone invented by Johann Philipp Reis (German, 1834-1874). First built in 1860, it was based on the principle of magnetostriction. Wire coiled around iron cores and needles caused contraction when a current flowed, producing an audible click in a resonator. However, the sounds were faint, and there was little interest in the invention. The practical development of the telephone was achieved by others, such as Alexander Graham Bell.
Crédit: Album / Science Source
Autorisations: ? Autorisation de modèle: Non - ? Autorisation de propriété: Non
Questions sur les droits?
Questions sur les droits?
Taille de l'image: 3000 × 1924 px | 16.5 MB
Taille d'impression: 25.4 × 16.3 cm | 1181.1 × 757.5 in (300 dpi)
Mots clés: ALLEMAND • ALLEMANDE • COMMUNICATION • ILLUSTRATION • TECHNOLOGIE
