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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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Why is a slit needed in Young double slit experiment?

Why is a slit needed in youngs experiment? Can two coherent light sources not undergo constructive and destructive interfernce without the need of a slit?
Ishan Poudel's user avatar