Biol1020-9.25-cell notes (microscopes)

Biol1020-9.25-cell notes (microscopes) - Cells: Cell...

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Cells: Cell Theory: Developed in the 19 th century by 3 German scientists: Schleiden, Schwann, and Virchow. 3 points: The cell is the basic unit of life. All living things consist of cells. Cells come from pre-existing cells. Grew’s Anatomy of Plants 1682; by Nehemiah Grew Microscopes: Magnification- ratio of the size of the image seen with the microscope to the actual size of the object. Ex.: 10mm insect is 50mm in microscope=50/10=5x magnification Empty magnification- magnification that goes beyond the magnifiable limit. Reached when image becomes blurry Resolution- clarity of the image The average plant or animal cell is 10µm-100µm 1000µm=1mm µ- “micron” µm- “micrometer” human eye resolution is 100µm Light microscope: Uses light beam and glass 0.2µm Allows you to see basic cell and larger cell parts Electron microscope Uses beam of electrons and electro magnetic field
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Biol1020-9.25-cell notes (microscopes) - Cells: Cell...

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