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Street lighting, optical devices, medical examination by an ophthalmologist, space navigation. How are special mirrors created? Many people have no idea that mirrors are used not only in everyday life. Without reflective mirrors, many scientific discoveries would not have happened. They are used as reflectors in telescopes and spotlights. In medicine: only with the help of a beam reflected by the retina from a mirror can an ophthalmologist examine the patient's fundus. Mirrors are used in almost all optical devices: spectrophotometers, galvanometers and rangefinders. The film tells how special mirrors are created; and in what areas of science mirrors play a key role. #mirror #howitismade #review #howitworks