This week, Chris wants to talk about Transparency in photography.
Water is a good example. Water is transparent, but the deeper it gets, the blacker because the light fails to reach deeper. Reflection can also affect water due to how shallow the angle is.
Ice is frozen water and it can be transparent. But the thicker it is, the darker because no reflections come from the bottom.
If you want to see deeper, eliminate reflections with a polarizer. It'll also make your colors bolder.