Einstein equivalence principle
parvaz-e hamug-arzi-ye Einstein
Fr.: principe d'équivalence d'Einstein
The → equivalence principle as stated by Einstein, on which is
based the theory of → general relativity. It comprises
the three following items:
Fr.: principe d'équivalence
A fundamental concept of physics, put forward by A. Einstein, that states that gravitational and inertial forces are of a similar nature and indistinguishable. In other words, acceleration due to gravity is equivalent to acceleration due to other forces, and gravitational mass is the same as inertial mass. Same as the → principle of equivalence.
weak equivalence principle
parvaz-e hamug-arzi-ye nezâr
Fr.: principe d'équivalance faible
All structureless bodies fall along the same → path in a → gravitational field, independent of their composition. Also known as → universality of free fall. See also: → equivalence principle, → Einstein equivalence principle.