Physics and Science
- Background (astronomy), small amounts of light coming from otherwise dark parts of the sky
- Background extinction rate, in geology
- Background independence, a condition in theoretical physics
- Background noise
- Background radiation, the natural radiation that is always present in a location
- Cosmic microwave background radiation, a natural constant radiation emanating throughout the universe
- Gravitational wave background
- Operational definition, in philosophy of science, distinguishing an object from its background of observation, or identifying what is and what is not part of it
- String background, in theoretical physics
- X-ray background
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Famous quotes containing the words physics and/or science:
“He who is conversant with the supernal powers will not worship these inferior deities of the wind, waves, tide, and sunshine. But we would not disparage the importance of such calculations as we have described. They are truths in physics because they are true in ethics.”
—Henry David Thoreau (1817–1862)
“Until politics are a branch of science we shall do well to regard political and social reforms as experiments rather than short-cuts to the millennium.”
—J.B.S. (John Burdon Sanderson)