From Hooke to Ruska Ernst Ruska 1 mm Nobel prize Human eyes in Physics 100um% 1986 Eukaryotic cells Eukaryotic cells 10 um Prokaryotic cells 5 Prokaryotic cells 1 um Optical microscope 100nm- Viruses Viruses Ribosomes 10 nm Proteins Ribosomes 0 1nm 1938 Vaccinia virus Heavy atoms 牛痘病毒 3 Heavy atoms 100pmFrom Hooke to Ruska 3 Vaccinia virus 牛痘病毒 Ernst Ruska Nobel prize in Physics 1986 Human eyes Optical microscope