They wrote a paper describing how it was possible to use stimulated emission for amplifying light waves  (laser) as well as microwaves (maser).
∙ A. Theodore Maiman
∙ B. KC Kao and GA Bockham
∙ C. Charles Townes and Arthur Schawlow
∙ D. Kapron, Keck and Maurer

1 Answer

Answer :

C. Charles Townes and Arthur Schawlow

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