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单词 converging lens or mirror
释义 converging lens or mirror
A lens or mirror that can refract or reflect a parallel beam of light so that it converges at a point (the principal focus). Such a mirror is concave; a converging lens is thicker at its centre than at its edges (i.e. it is biconvex, plano-convex, or convexo-concave). Compare diverging lens or mirror
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更新时间:2025/6/22 22:19:03