Conditions
There are five conditions that must be satisfied to use this technique :
1. The sample must have a flat shape of uniform thickness
2. The sample must not have any isolated holes
3. The sample must be homogeneous and isotropic
4. All four contacts must be located at the edges of the sample
5. The area of contact of any individual contact should be at least an order of magnitude smaller than the area of the entire sample.
Read more about this topic: Van Der Pauw Method
Famous quotes containing the word conditions:
“Mankind always sets itself only such tasks as it can solve; since, looking at the matter more closely, we will always find that the task itself arises only when the material conditions necessary for its solution already exist or are at least in the process of formation.”
—Karl Marx (1818–1883)
“Statecraft is soulcraft. Just as all education is moral education because learning conditions conduct, much legislation is moral legislation because it conditions the action and the thought of the nation in broad and important spheres of life.”
—George F. Will (b. 1941)
“The Supreme Court would have pleased me more if they had concerned themselves about enforcing the compulsory education provisions for Negroes in the South as is done for white children. The next ten years would be better spent in appointing truant officers and looking after conditions in the homes from which the children come. Use to the limit what we already have.”
—Zora Neale Hurston (1891–1960)