The principle that effect cannot precede cause. The principle is particularly useful when combined with the principle that the highest attainable speed in the universe is the speed of light in a vacuum.
Causality is used to analyse the results of scattering experiments and in optics.
1. relativity A Dictionary of Science, Oxford University Press 2. Speed of Light Bloomsbury Guide to Human Thought 4. The Macmillan Encyclopedia 2001 5. All rights reserved.