The ratio of visible light transmitted through the window to that which is incident upon the window.

太阳光穿过玻璃窗的可见光的数量与投射在上面的之比。

youdao

The ratio of visible light transmitted through the window to that which is incident upon the window.

太阳光穿过玻璃窗的可见光的数量与投射在上面的之比。

youdao