Electrical resistivity tomography

Electrical resistance tomography is like using X-rays to see what is inside an object or a material, but instead of taking a picture with X-rays, we use electricity. We send a low voltage electric current through the material that we are studying. Then, we use special equipment to measure how much resistance we get in different parts of the material. We can then use this map of resistance to create a picture of what is inside the material. In some cases, it can tell us where there are weaknesses in the material or show us what minerals are present.