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In 1935, Max Knoll invented the scanning electron microscopy (SEM) in Germany to study the targets of television tubes.

United statesUnited kingdomZuid hollandCharles oatleyZhu inadaDennis mcmullanMax knollCambridge universityAnalysis centreDelft university of technologyCambridge scientific instrument company for dupontSir charles oatleyCambridge scientific instrument companyElectron microscopeElectron microscopy schemeScanning electron microscopy