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tou jing ji qi ying yong
Author(s): 
Pages: 39-43
Year: Issue:  11
Journal: School Journal of Mathematics

Keyword:  凸透镜成像我国古代凹透镜会聚作用主光轴物体折射光线平行光线锌含量相关性;
Abstract: <正>一、中国古代“冰燧取火”的记载我国古代就认识到了凸透镜的聚焦作用.晋代张华的《博物志》有记载:“削冰令圆,举以向日,以艾承其影,则得火.”用冰取火,似乎不可思议,但这绝非讹传,这是利用了凸透镜对光的会聚作用.二、透镜对光的作用
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