two attached low-magnification adjustable telescopes {binoculars}.
Electron beams can pass through {transmission electron microscope}, or reflect from {scanning electron microscope}, 0.1-micron thin slices {electron microscope}| (EM). Electric and magnetic fields focus electrons onto a phosphorescent screen. Microscopes can use electrons with energy above 1 MeV, because they act like X-rays. Electrons can pass through tissue and focus. Electron microscope resolution is 10^-10 meter.
Concave and convex lenses can focus and magnify images that are small and far away {telescope}|. Light amount increases with larger opening. Refracting telescopes have a large lens that collects light to a focal point, and a second small high-curvature lens that focuses image for viewing. Reflecting telescopes have a large lens that collects light to a mirror, which focuses light on a second small high-curvature lens that focuses image for viewing.
X-ray beams can pass through 0.1-micron slices {x-ray microscope}|. X-rays focus by electric and magnetic fields onto phosphorescent electron-gun-TV-like screen.
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Date Modified: 2022.0225