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Text File  |  1992-09-01  |  363b  |  10 lines
  1. 1913- . US physicist who revised the quantum
  2. theory of Paul Dirac. The hydrogen atom was
  3. thought to exist in either of two distinct
  4. states carrying equal energies. More
  5. sophisticated measurements by Lamb in 1947
  6. demonstrated that the two energy levels were
  7. not equal. This discrepancy, since known as
  8. the Lamb shift, won for him the 1955 Nobel
  9. Prize for Physics.
  10.