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A microscope with only one lens is call what?
A simple microscope an electron microscope is one that uses the focus of electron beams instead of regular light from lenses. It allowed scientists to discover new germ cells, bacteria, and eventually viruses. the simple microscope was invented in 1600s
Which tools might a geologist use to examine a rock sample more closely?
There are a number of differing instruments used to more closely examine rocks. The simplest is the hand lens (or loupe),A used to observe hand specimens of rocks in the field and aides identification of rock forming minerals. Hand lenses typically magnify between 3 - 10 times normal size. If the geologist decides the sample is of further interest they will return to the lab and have thin sections of the rock cut and mounted on slides. To make the thin sections, the rock is ground down to a thickness of 0.03mm (30 microns) where most minerals become more or less transparent and can be studied by a petrographic polarising microscope using transmitted light.B Petrographic microscopes typically magnify between 40 - 600 times normal size. For even more detailed study, a scanning electron microscopeC or X-ray diffractometerD may be used which can examine crystal lattice structures at the atomic scale - A process known as X-ray crystallographyE A Loupe / Handlens - Wikipedia Entry. B The Polarising Microscope - The University of Bristol. C Yale Electron Microprobe and SEM Lab. D Yale (Geology & Geophysics) X-Ray Diffraction Lab. E X-ray Crystallography - Wikipedia Entry. Please see related links.
