干净透明的玻璃,看来是完全透明的,但是,如果把若干层叠合起来,这个重叠起来的玻璃块,就会变成半透明或不透明的东西。当玻璃的厚度不很大的时候,虽然光线还能勉强透过,但是透过来的只有深绿或浅蓝色的光线,而不是原来的白光。这就是说,干净而透明的玻璃,实在不是完全透明无色的。海洋中的水也具有同样的性质,在离陆地很远的 The clean, transparent glass appears to be completely transparent, but if several stacks are stacked, the overlapping glass blocks become translucent or opaque. When the thickness of the glass is not very large, although the light can barely through, but only through the dark green or light blue light, rather than the original white light. This means that a clean and transparent glass is not completely clear and colorless. The water in the oceans also has the same properties, far from the land