Why does water turn white in a waterfall?

I had never thought about that before so I wondered about it for awhile. I am not sure of the answer, but I think it is something like this.

Light is reflected from a quiet pool of water as if the surface were a mirror. But if water is broken up into droplets, then there are many small pieces of water surface reflecting at many different angles. Such a surface looks white.

You might think of glass that is clear and colorless. Some of the light that falls upon it is reflected from its smooth surface. But if the glass is ground or “frosted” to give it a rough surface, then it also looks white.

So I think that clouds and waterfalls look white because their water droplets make many little mirrors reflecting light in all directions. The many little water surfaces make what is called a diffuse reflector.