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| Lot # 1172 ARTHUR L. SCHAWLOW - FIRST DAY COVER SIGNED CIRCA 1973 CO-SIGNED BY:KAI M. SIEGBAHN , NICHOLAAS BLOEMBERGEN - Document 222718 |
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SPECTROSCOPY. Philatelic Envelope signed: "Arthur L.
Schawlow", "Nicolaas Bloembergen" and "Kai Siegbahn", 6½x3½. First Day Cover honoring Marconi, 6-cent Progress in
Electronics and 2-cent Frank Lloyd Wright stamps affixed, postmarked
New York, NY, July 10, 1973, FIRST DAY OF ISSUE. The 1981 Nobel Prize in
Physics was shared by ARTHUR L. SCHAWLOW and NICOLAAS BLOEMBERGEN
"for their contribution to the development of laser spectroscopy" and KAI
SIEGBAHN "for his contribution to the development of high-resolution
electron spectroscopy". Spectroscopy is the study of spectra, especially
experimental observation of optical spectra. Fine condition.
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