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Zacharias and Hans Janssen made one of the first compound microscope
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robert hooke's compound focused a light from the flame onto the specimen.
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although his microscope lens was small it could magnify 266 times
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this modern microscope can magnify up to 1,000 times
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German scientist Ernest Ruska created the the first electron microscope that magnify up to 500,000 times
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The SEM can magnify up to 150,000 times
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Track leaks or tunneling of the surface of the specimen.Can magnify 1,000,000 times