convex
an electron
What kind of microscope has the greatest magnification
electron microscope
ocular lens
Considering the microscope wasn't invented until 100 years or so after his death, he didn't use any kind at all.
convex
Parabolic curve
light microscope
electric microscope
An optical microscope
A light microscope
It depends on what kind of microscope you're using.
compound light microscope
its a sphere
It is curved
circle, compound curve, elipse . . . .
Electron microscope