The analysis and calculation indicate that the image of a square for a wedge prism is in the shape of bell with a convex side rather than with a concave side.
分析和计算都表明，正方形物体经光楔所成的像是凸侧面的钟形而不是凹侧面的钟形。
A black box at the centre of the shop marks the location of a staircase, which leads up through a "wedge-shaped" volume to connect the two floors of the 200-square-metre interior.
在商店中心的一个黑盒子标记一个楼梯的位置，它通过一个“楔形”的体积连接200平方米内部的两个楼层。
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