- physics was long called natural philosophy
- the structure of matter and the interactions between the fundamental constituents of the observable universe - concerned with all aspects of nature on both the macroscopic and submicroscopic levels
- the behavior of objects under the action of given forces and the nature and origin of gravitational, electromagnetic, and nuclear force fields
- physics' laws, typically expressed with economy and precision in the language of mathematics
- a theory that reliably predicts the results of experiments to which it is applicable is said to embody a low of physics
- Physics is experience, arranged in economical order. (E. Mach)
- Both art and physics are unique forms of language. Each has a specialized lexicon of symbols that is used in a distinctive syntax. Their very different and specific contexts obscure their connection to everyday language as well as to each other. Nevertheless, it is noteworthy just how often the terms of one can be applied to the concepts of the other. "Volume," "space," "mass," "force," "light," "color," "tension," "relationship," and "density" are descriptive words that are heard repeatedly if you trail along with a museum docent. They also appear on the blackboards of freshman college physics lectures. The proponents of these two diverse endeavors wax poetic about elegance, symmetry, beauty, and aesthetics. While physicists demonstrate that A equals B or that X is the same as Y, artists often choose signs, symbols, and allegories to equate a painterly image with a feature of experience. Both of these techniques reveal previously hidden relationships. (Leonard Shlain)
- The axioms of physics translate the laws of ethics. Thus, "the whole is greater than its part;" "reaction is equal to action;" "the smallest weight may be made to lift the greatest, the difference of weight being compensated by time;" and many the like propositions, which have an ethical as well as physical sense. These propositions have a much more extensive and universal sense when applied to human life, than when confined to technical use. (Ralph Waldo Emerson)
- The color, quality, and chemical behavior of all familiar matter has been explained by research in electricity and magnetism.
- The nature of physics is that you ponder the falling of an apple and realize what holds the planets in their courses; you look to see what happens when you pass electric currents through a gas and, in due course, you find out what holds a stone together and why grass is green.
- An atom consists of a heavy nucleus surrounded by a number of lightweight electrons exactly neutralizing the electric charge on the nucleus. The electrons group themselves around the nucleus in "shells," like the layers of an onion - each shell capable of accommodating a definite number of electrons.
« Back to the list of categories