August 2022 1 13 Report
Луч падает на границу раздела воздух-жидкость под углом 45 градусов и преломляется под углом 30 градусов. При определенном угле падения, угол между преломленным и отраженным лучами будет 90°. Найдите тангенс этого угла.
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