We start by recalling some elements of magnetism. In a bar magnet each pole is regarded as being concentrated at a point near, but not at, the end of the magnet. The line joining the poles is called the magnetic axis and the distance between them is called the magnetic length 2ℓ. For a simple bar magnet the magnetic length is usually 5/6 the length of the bar.
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Suggestions for Further Reading
- Gay, S.P., 1967. Standard curves for interpretation of magnetic anomalies over long tabular bodies, pp. 512–548 in Mining Geophysics Vol. II eds. D.A. Hansen, R.E. MacDougall, G.R. Rogers, J.S. Sumner and S.H. Ward, Society of Exploration Geophysicists, Tulsa, Okla.Google Scholar
- Grant, F.S. and West, G.S., 1965. Interpretation theory in applied geophysics, McGraw-Hill, New York.Google Scholar
- Nettleton, L.L., 1976. Gravity and magnetics in oil prospecting, McGraw-Hill, New York.Google Scholar
- Smellie, D.W., 1967. Elementary approximations in aeromagnetic interpretation, pp. 474–489, in Mining Geophysics Vol. II, eds. D.A. Hansen, R.E. MacDougall, G.R. Rogers, J.S. Summner and S.H. Ward, Society of Exploration Geophysicists, Tulsa, Okla.Google Scholar
- Strangway, D.W., 1970. History of the earth’s magnetic field, McGraw-Hill, New York.Google Scholar