Laser - Rudolf W. Ladenburg confirmed the existence of the phenomena of stimulated emission and negative absorption
Time: 1928
Place: Germany
Details: In 1928, Rudolf W. Ladenburg confirmed the existence of the phenomena of stimulated emission and negative absorption.
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World War II-German declaration of war against the United States
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1928


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1928 - Germany


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Ho Chi Minh-Returning to Asia
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1928 - Sicily, Italy


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Anna May Wong-Schmutziges Geld
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Richard Nixon-Transfer To Whittier High School
Sep, 1928 - Whittier, California, U.S.


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1928 - San Francisco, California, U.S.


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1928 - Pennsylvania, United States


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Nov, 1928 - Tokyo, Japan


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1928 - England, United Kingdom


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1928 - Italy