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95. На рисунке a указаны положения главной оптической оси MN тонкой линзы, светящейся точки S и её изображение S. Указать вид линзы. Найти построением оптический центр О линзы и её фокусы F. Среды по обе стороны линзы одинаковы.
95. На рисунке a указаны положения главной оптической
