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: Use mirrors or prisms to see over or around obstacles. Modern & Industrial Applications
: Use lenses or mirrors to view distant celestial bodies. optical device
: Correct vision by refracting light to focus it correctly on the retina. : Use mirrors or prisms to see over or around obstacles
An is any instrument that uses light to produce an image or process visual information. These devices range from everyday tools like eyeglasses to advanced communication lasers. Common Examples optical device