最终反射器轮廓一般会掠过灯具周围并通过灯具轴线横穿过垂直线。
The final reflector contour generally sweeps around the lamp and crosses the vertical line through the lamp axis.
而大脑则以为反射光线是沿直线到达眼睛的，因此沿反射光线向后延伸，从而在镜子后面看到一个影像。
However, brain thinks that the reflected light comes to eyes in a straight line, so an image is seen behind the mirror just on the extending line of the reflected light.
通常，利用调制反射法测量高能电子直线加速器波导网络的相长度。
Modulated reflection method is used in general for measuring phase lengths of waveguide net-work in construction of electron linear accelerators.
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