using microscope to look at cells

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  • using microscopes to look at cells
    • it is not possible to see cells as separate objects using the naked eye
    • the ability to see two or more objects as separate objects is called resolution
    • the light microscope was developed in the late 16th century and gave a greater resolution than the human eye
    • it allowed scientist to see plant, animal and bacterial cells
    • some sub-cellular structures are even smaller than the resolution achieved by a light microscope and cannot be seen using this method
    • in 1933 scientists first used an electron microscope
    • an electron microscope passes electrons rather than light through the specimen and can give much better resolution
    • cells can be seen in much finer detail

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