Shadow Wallpaper

当光被遮挡的东西发生阴影

Shadows occur when the light is blocked by something, then shadows form. Light travels in a straight line. When the light is blocked by something, there will be a shadow of the barrier.

If the light source is weak, like the sun on a cloudy day, the shadow is subtle. In the shade there is no shadows, because the shade is already a shadow of an object that blocks the sun. The force of the light determines the sheer thickness of the object's shadow, the distance of the source of light and the distance of the object to the object in its shadow determines the length and the shortness of the image if the shadow overwrites another object. The long sunlight source of the shadow of the object is determined by the angle of the sun's height while the other light source is determined by the distance of the object to the central point of the light source.

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