Banff Springs Hotel with light blue filter emphasizes the coldness of winter (Monochromatic color).
班芙泉酒店，用浅蓝色滤光镜强调冬天的寒冷单一色。
A satisfactory approximation to monochromatic light can be obtained with a filter placed in front of the arc.
在碳弧前面放一个滤光片就可以得到令人满意的近单色光。
A satisfactory approximation to monochromatic light can be obtained with a filter placed in front of the arc.
在碳弧前面放一个滤光片就可以得到令人满意的近单色光。
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