Helmut Wiedemann Story
Herr Doktor Professor Wiedemann was a master of estimation.
He could calculate almost anything, by hand, on his feet, at the board, and come very close the exact answer. A true ‘physicist’
One time I had a question about a section on intrabeam scattering in one of Professor Wiedemann's books. We talked about it and got the formula straightened out but the really important comment Helmut made was 'nobody understands these things the first time through'.