However, the main value of the experiment is that it increases our understanding of basic physical concepts, such as vacuum fluctuations — the constant appearance and disappearance of virtual particles in vacuum. (religion.blogs.cnn.com)
Because we live in the physical world, he explains, we're very familiar with physical concepts such as spatial distance, or warmth and cold. (sciencemag.org)
Mechanical comprehension or reasoning tests assess a candidate's knowledge of machinery and other physical concepts. (jobtestprep.com)