The theory of relativity usually encompasses two interrelated theories by Albert Einstein: special relativity and general relativity, proposed and published in 1905 and 1915, respectively. Special relativity applies to all physical phenomena in the absence of gravity.
The theory of relativity can refer to either Special Relativity or General Relativity. The latter, as you might surmise includes the former as a special case. Special relativity is a formulation of the kinematics and dynamics of physics which makes compatible the following, seemingly incompatible, two postulates:
The laws of physics are the same in all inertial frames of reference.
The speed of light in vacuum is the same in all inertial reference frames.
Answers & Comments
The theory of relativity usually encompasses two interrelated theories by Albert Einstein: special relativity and general relativity, proposed and published in 1905 and 1915, respectively. Special relativity applies to all physical phenomena in the absence of gravity.
Answer:
The theory of relativity can refer to either Special Relativity or General Relativity. The latter, as you might surmise includes the former as a special case. Special relativity is a formulation of the kinematics and dynamics of physics which makes compatible the following, seemingly incompatible, two postulates:
The laws of physics are the same in all inertial frames of reference.
The speed of light in vacuum is the same in all inertial reference frames.