I saw a photograph taken from an electron microscope, with some text.
I want to know what is the meaning of these numbers and letters?
Thank you! Regards.
1.40kX is the zoom (1400x),
WD is the working distance (distance between the final lens and the object),
20kV is the voltage used to accelerate the electrons,
20μm is the scale.
I'm not aware of the other two.