光源为18W自镇流荧光灯,光通量为12001m,求P点地面水平照度(只计直射光)为() .A. 78丨x; B86lx; C. 951x; D....

作者: tihaiku 人气: - 评论: 0
问题 光源为18W自镇流荧光灯,光通量为12001m,求P点地面水平照度(只计直射光)为() .
选项 A. 78丨x; B86lx; C. 951x; D. 105lx。
答案 B
解析

相关内容:光源,荧光灯,光通,12001m,地面,水平,照度

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