In case of liquid core fibers, this means that the optical density of the liquid inside the core changes significantly with the intensity of the incident light. (sciencedaily.com)
We know that the planet has a partly solid, partly liquid core, composed largely of iron, surrounded by a thick, flowing mantle, topped by a thin layer of crust. (discovermagazine.com)
Golf balls can be swallowed by some of the larger breeds, and they all contain a poisonous liquid core. (siriusdog.com)