What happens when co2 gas is bubbled through lime water in small amount?
The lime water becomes foggy.
Some of the light will pass through the window. Some of the light will be reflected by the window. A small amount of light will be absorbed by the window. This amount could be increased for certain wavelengths by UV or IR coating. The light that passes through the window will be refracted (or bent) slightly. However, it will not be significant for a thin window pane.