The sky also appears blue from a distance. Go near and you will see that it has no colour at all.
天空从远处看也呈现出蓝色，走近看也会发现它没有颜色。
In the vacuum or infinite evenly charged dielectric materials, the field strength of its surface equals at all spots. And it has no relation with the distance of the field spots to the surface.
在真空或无限大均匀电介质中，无限大均匀带电平面的电场强度处处相等，和场点距离该平面的远近无关。
In the vacuum or infinite evenly charged dielectric materials, the field strength of its surface equals at all spots. And it has no relation with the distance of the field spots to the surface.
在真空或无限大均匀电介质中，无限大均匀带电平面的电场强度处处相等，和场点距离该平面的远近无关。
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