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Special relativity
Theory of interwoven space and time by Albert Einstein / From Wikipedia, the free encyclopedia
In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time. In Albert Einstein's 1905 treatment, the theory is presented as being based on just two postulates:[p 1][1][2]
- The laws of physics are invariant (identical) in all inertial frames of reference (that is, frames of reference with no acceleration).
- The speed of light in vacuum is the same for all observers, regardless of the motion of light source or observer.
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The first postulate was first formulated by Galileo Galilei (see Galilean invariance).