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关于三棱镜的折光特点,原高中物理教材和现新编教材都这样讲,由于光线在棱镜的两个办面上折射两次都偏向底边
With regard to the prismatic refraction characteristics, the original high school physics textbooks and the newly edited textbooks all talk about this, because the light is refracted twice on the two surfaces of the prism and both tilt towards the bottom.