Loudspeaker and microphone used in school physics experiments on sound waves,the speed of sound and sound frequency | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Chillmaid, Martyn F. |
Taille de l’image : | 5760 px × 3840 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |