What will I research? In this case study, I will explore what resistivity is and how a resistivity investigation works using the principles of physics. I will also explore what benefits this technique might bring, but also what the shortcomings might be. Additionally, I will explore a famous historical use of this method. What is resistivity? Resistivity is the opposite of conductivity. It is a measure of the material's ability to oppose the flow of electric current. It is a property of the material and remains constant, it does not depend on the specific shape of the material, however it depends on the mass and density of the particular material. The resistivity of a particular material can be found by multiplying the resistance of the material by its cross-sectional area and then dividing by its length, as shown in the following equation: ρ = (RA) ÷ l (where ρ= resistivity of the material , R= the strength of the material, A= the cross-sectional area of ​​the material and l= the length of the material)What is a resistivity survey and how does it work?A resistivity survey is a geophysical technique used to establish the structure of the earth's surface. It is a technique that has been used and developed over the last two centuries. It uses a pair of probes to conduct electrical current into the ground, by doing so they can measure the resistance of the ground. In most archaeological investigations, one of the probes is used to conduct current through the ground and another probe is used to measure the potential difference in the current circuit. The ground resistance between both probes can then be calculated using the equation: R = V ÷ I (where R= the ground resistance, V= the power...... half of the paper..... . ite of the first Norman encampment and landing site before the famous Battle of Hastings In 1993 Austin carried out the survey to cover an area of ​​560 x 320m, which he believed to be the location of the main Norman fort metro and displaying the results on. a computer, measured the soil resistance at 1 meter intervals. This interpreted data provided some regions of bright, low resistance spots that were most likely wet ditches, but also discovered areas of high resistance, indicated by dark spots . Austin although these were most likely walls. Interpreting his data, led him to believe he had discovered the perimeter of the fort where it was surrounded by moats. However his most significant discovery was a square shaped structure in the center of the perimeter according to him it was probably the keep of the fort.