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The romans mention making the first magnifying glass. 1st century AD

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galileo makes or discovers lenses and focusing. 17th century.

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then in 1665 Robert Hooke made the first british compound. It was a light microscope with two converging lenses system. then he discoverd the cell.

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first person to discover a live cell with a microscope was anton van leeuwenhoek.

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anton makes the single lenses microscope in 1670

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anton van leeuwenhoek then grinded very thin glass lenses. But they where able to magnify by 700 times. Then single lenses microscopes where much better then the other ones. Would uses transmitted light

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In 1931 german scientist Max Knoll and ernest ruska. But this doesnt use light but this uses electrons. And this microscope goes up to one million times.