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Optics is the study of the properties and behavior of light. In this section you can learn about everything from holograms to lasers and lenses.

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Quiz: A Wardrobe of Invisible Cloaks

That's quite a snazzy outfit you have on, but an invisibility cloak would totally complete the look. But which one will you choose from the wardrobe of invisibility? We better test your knowledge on the subject of invisibility in fiction and myth.