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A Analogy Between Light Microscope and Electron
Depth Of Field and Contrast
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accelerating potential adequate amyl acetate aperture angle Applied Physics average bacteria bombardment calibration carbon black Chapter chemical chromatic aberration condenser lens contrast crystals deposit depth of field deviation diagram diameter diffusion pump effects elec electron beam electron diffraction electron micro electron microscope electrostatic emitted emitter employed equation evaporated factors fibers Figure filament final image fluorescent screen focus focusing glass slide grid half-aperture angle heat high voltage Hillier hundred angstroms instrument intensity ionization ions Journal of Applied kilovolts laboratories lenses light microscope limiting resolution magnetic field magnification material maximum measurements metal method micrographs micron microtome objective lens observation obtained optics oxide percent photographic plane pole piece polystyrene portion possible procedure projector lens radiation replica technique scattered electrons shadow-casting significant silica specimen mount specimen particles spherical aberration structure studies surface temperature thickness thin tion tungsten type of specimen vacuum velocity wave length x-ray