Seismometer experiment

Numéro d’image : 11831921
Seismometer experiment
MODEL RELEASED. Seismometer experiment. Two pupils with a makeshift seismometer,a device used to measure seismic waves in the Earth's crust. These waves are often caused by shifts in the Earth's tectonic plates. The pencil on the spring responds to vibrations,drawing representations of them on the paper. In order to pick up such minute tremors a seismometer needs to be enclosed,to protect it from movements in the air. To cut out local vibrations it also needs to be fixed onto a large immovable surface,such as a block of stone. Since this apparatus is on a table in the open,it is wholly ineffective
Licence : Droits gérés
Crédit: Science Photo Library / Andrew Lambert Photography
Taille de l’image : 4851 px × 3611 px
Model Release : Disponible
Property Release : Non requis
Restrictions : -

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