Its all about Physics.

  Electron microscope : Introduction: An electron microscope is a microscope that illuminates with a beam of accelerated electrons. Electron microscopes offer a higher resolving power than light microscopes and may expose the structure of smaller objects since the wavelength of an electron can be up to 100,000 times shorter than that of visible light photons. While conventional light microscopes are constrained by diffraction to around 200 nm resolution and usable magnifications below 2000, a scanning transmission electron microscope has achieved more than 50 pm resolution in annular dark-field imaging mode and magnifications of up to roughly 10,000,000.   Electron microscope Similar to how optical light microscopes employ glass lenses, electron microscopes create electron optical lens systems using structured magnetic fields.   Microorganisms, cells, big molecules, biopsy samples, metals, and crystals are just a few of the biological and inorganic specimens that can have...