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Compound microscopes, which combine an objective lens with an eyepiece to view a real image achieving much higher magnification, first appeared in Europe around 1620. In 1665, Robert Hooke used a microscope about six inches long with two convex lenses inside and examined specimens under reflected light for the observations in his book ...
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When scientists use a traditional microscope to observe a cell, they use stains -- chemicals that color parts of the cell to make them visible. However, these stains cause damage and kill the cell ...
1621: Cornelis Drebbel presents, in London, a compound microscope with a convex objective and a convex eyepiece (a "Keplerian" microscope). c.1622: Drebbel presents his invention in Rome. 1624: Galileo improves on a compound microscope he sees in Rome and presents his occhiolino to Prince Federico Cesi , founder of the Accademia dei Lincei (in ...
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