Teachers
Exploring with Physics II Borehole Logging
Open University 25mins, 14±
Once a mineral source has been identified it is necessary to test the hypothesis by sinking a borehole. This allows one to look at the succession of rocks which may be encountered. Special instruments are designed to measure radioactivity and conductivity and other properties of the rock in the borehole. Minerals within the rocks are identified using a petrological microscope. This programme gives an excellent explanation of the physics involved of the petrological microscope which depends on polarised light, refraction and interference patterns.
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