catoptrics
n. 反射光学 [医] 反射光学
释义与例句
n.
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1.
The branch of optics dealing with reflection.
不可数'tis ordinary to see strange uncouth sights by catoptrics; who knows not that if in a dark room the light be admitted at one only little hole, and a paper or glass put upon it, the sun shining will represent on the opposite wall all such objects as are illuminated by his rays?