Introduction to cells review (article) | Khan Academy
https://www.khanacademy.org/science/high-school-biology/hs-cells/hs-introduction-to-cells/a/hs-intro-to-cells-review
WEBIn order to view cells, scientists must use magnifying tools called microscopes. Simple light microscopes, such as magnifying glasses, generally are not powerful enough to view cells. Therefore, scientists need to use compound light microscopes or electron microscopes to see detailed cell structures or very small objects, such as viruses.
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