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![[Павел ВИКТОР] Урок 370. Механические волны. Математическое описание бегущей волны](https://sun9-10.userapi.com/impg/8N3kJk11L0stldSTE66wXvZNXiXo2EqJaLvgrg/0Ne-ygTXP5A.jpg?size=320x240&quality=95&keep_aspect_ratio=1&background=000000&sign=2514428cda15cf5a5f77c896acdea81d&c_uniq_tag=RYXhqQ18Od49dtiwb-axTECaqxctbH8XKQjiSF48qoM&type=video_thumb)
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![[Павел ВИКТОР] Урок 391. Законы геометрической оптики - 1](https://sun9-64.userapi.com/impg/86J1bfBSjLnXWNnGwFUA7dIai-Y7thl--7Fj3w/k9Y6bWkqFx8.jpg?size=320x240&quality=95&keep_aspect_ratio=1&background=000000&sign=7b77385de73ca39d8ca3fcb5dd13b502&c_uniq_tag=vpCQ8pEgfogcEuwo66FPQ_QJ_3CcCEH21J584DH1bBE&type=video_thumb)
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