Electricity and Magnetism

  • David Cassidy
  • Gerald Holton
  • James Rutherford
Part of the Undergraduate Texts in Contemporary Physics book series (UTCP)


Two natural substances, amber and lodestone, have awakened curiosity since ancient times. Amber is sap that oozed long ago from certain softwood trees, such as pine. Over many centuries, it hardened into a semitranspar­ent solid akin to model plastics and ranging in color from yellow to brown. It is a handsome ornamental stone when polished, and sometimes contains the remains of insects that were caught in the sticky sap. Ancient Greeks recognized a strange property of amber. If rubbed vigorously against cloth, it can attract nearby objects, such as bits of straw or grain seeds.


Electric Charge Electric Field Strength Electric Force Gravitational Potential Energy Test Body 
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Further Reading

  1. G. Holton and S.G. Brush, Physics, The Human Adventure, ( Piscataway, NJ: Rutgers University Press, 2001 )Google Scholar
  2. B. Franklin, The Autobiography of Benjamin Franklin,(New York: Dover, 1996), and many other editions.Google Scholar

Copyright information

© Springer Science+Business Media New York 2002

Authors and Affiliations

  • David Cassidy
    • 1
  • Gerald Holton
    • 2
  • James Rutherford
    • 3
  1. 1.Natural Science ProgramHofstra UniversityHempsteadUSA
  2. 2.358 Jefferson Physical LaboratoryHarvard UniversityCambridgeUSA
  3. 3.American Association for Advancement of ScienceUSA

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