2. Solved Papers
  3. Haryana PMT

Haryana PMT Haryana PMT Solved Paper-2008

  • question_answer
    Who for the first time developed electron microscope?

    A)  Knoll and Ruska              

    B)  Rudolf and Kolliker

    C)  Robert Hooke                  

    D)  Swanson

    Correct Answer: A

    Solution :

    Knoll and Ruska discovered electron microscope in 1932.


You need to login to perform this action.
You will be redirected in 3 sec spinner