Question

Who invented electron microscope?

• A. Janssen
• B. Edison
• C. Knoll and Ruska
• D. Landsteiner

Answer 1

The correct option is C Knoll and Ruska

• The electron microscope was designed by Knoll and Ruska of Germany in 1932, Marton of Belgium in 1934 and Priebus and Miller of Canada in 1934. It has a very high resolving power
• Siemens produced the first commercial transmission electron microscope. The present limit of resolution of the electron microscope is about 3 $\mathring{A}$.