One instrument is known as a magnifying glass (or lens).
Others are microscopes, and telescopes. Periscopes can also magnify. These instruments usually use lenses to view small things. An electron microscope can do something similar, but it does not use a lens.
microscope
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The instrument used to make extremely small things look larger so humans can see them is a microscope.
Magnifying glasses
A magnifying glass, or to REALLY enlarge things, a microscope.
A small medium at large
An instrument that makes small things look large is called a microscope. Microscopes are used in various fields, such as biology and materials science, to observe tiny objects that are not visible to the naked eye. They work by using lenses or electron beams to magnify the image of the specimen.
microscope
A Small Medium, at Large.
Microscopes
microscope
Brownian motion is what the type of motion that characterizes the wiggling of small things in solutions.