Because optics are so widely used in practice, optical physics and engineering optics have a lot of overlap in terms of fields. Optics is also closely related to many disciplines such as electrical engineering, physics, astronomy, medicine (especially ophthalmology and optometry). Many key technologies can be found in the study of optics, including mirrors, lenses, telescopes, microscopes, lasers, optical fibers, light-emitting diodes, photovoltaic, and more.
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