Microscopes are tools that focus light which is shining through a specimen into our eye and allow us to see very tiny things as if they were 40-1000 times their actual size. The image we see is what exists at the focal point and the size of the focal point determines how clearly you can see the object. Use this simple microscope here to explore how focusing works and see if you can get the specimen in focus by moving the stage to the correct location with the red dot.
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