A Complete Collection of 100000 Whys
Fav十万个为什么
为什么汽车后视镜有虚线？
简单的摘要：汽车后视镜有虚线的原因主要是扩大视野、减少盲区以及提示影像变形。
1、虚线设计通过双曲率镜面扩大了驾驶员的观察视野，虚线外侧的镜面曲率较大，能够覆盖更广的范围，减少后视镜盲区，提高行车安全性。
2、虚线将后视镜分为内外两个区域，外侧区域类似放大镜，可以放大车身侧面较远处的物体，使驾驶员更容易察觉到靠近车身的车辆或障碍物，从而避免潜在危险。
3、虚线还起到提示作用，提醒驾驶员虚线以外的影像可能存在一定程度的变形，避免因误判距离或位置而引发事故，尤其在高速行驶或变道时尤为重要。
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