A
physical law or
scientific law "is a theoretical statement
inferred from particular facts, applicable to a defined group or class of
phenomena, and expressible by the statement that a particular phenomenon always occurs if certain conditions be present." Physical laws are typically conclusions based on repeated scientific
experiments and
observations over many years and which have become accepted universally within the
scientific community. The production of a summary description of our environment in the form of such laws is a fundamental aim of science. These terms are not used the same way by all authors.