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Optics is the study of light, and its interaction with matter. It includes topics such as imaging systems, fiber optics, lasers, quantum optics, and more.

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How does the grid on the microwave oven window prevent microwave radiation from coming out?

   The metal mesh, or 'cage' around a microwave's oven cavity acts as a Faraday cage (see Wikipedia article on Faraday cage here), although a 'true' Faraday cage is grounded, and a microwave cage is n …
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