In relativistic classical field theories of gravitation, particularly general relativity, an energy condition is one of various alternative conditions which can be applied to the matter content of the theory, when it is either not possible or desirable to specify this content explicitly. The hope is then that any reasonable matter theory will satisfy this condition or at least will preserve the condition if it is satisfied by the starting conditions.
In general relativity, energy conditions are often used (and required) in proofs of various important theorems about black holes, such as the no hair theorem or the laws of black hole thermodynamics.
Read more about Energy Condition: Motivation, Some Observable Quantities, Perfect Fluids, Attempts At Falsifying The Strong Energy Condition
Famous quotes containing the words energy and/or condition:
“Violence among young people ... is an aspect of their desire to create. They don’t know how to use their energy creatively so they do the opposite and destroy.”
—Anthony Burgess (b. 1917)
“Humility is a grace that shines in a high condition but cannot, equally, in a low one because a person in the latter is already, perhaps, too much humbled.”
—Samuel Richardson (1689–1761)