Do all liquids reflect light?

Yes. At some level. Mercury is a very shiny liquid. Most liquids are not that reflective. You've probably seen a sunset reflecting off the ocean. So water reflects. But it's also transparent. Mercury is not transparent. Just to be clear, it's the surface of the liquid that reflects. It's not the liquid itself. read more

Just to be clear, it’s the surface of the liquid that reflects. It’s not the liquid itself. If you are swimming underwater, sunlight coming down through the water does not reflect from the water inside the water. It only reflects at the surface of the water. read more

The results of the experimentation came in two parts, one was the actual reflection and refraction of the light and the other was the properties that affected it. The light reflection testing results were constant because all of the liquids reflected the light at 45 degrees. read more

It might be hard to believe, but even a dense solid surface such as lead has some permeability, and light has a speed even in lead (The Speed of Light and the Index of Refraction) so although Maxwell's equations can be used for things like light, they can also be used for electromagnetic fields of electrons travelling in a conductor. read more