Definition

1. Noun:
   • A physical theory of relativity: This is a scientific theory developed by Albert Einstein. It is based on two key assumptions: first, that the speed of light in a vacuum is constant for all observers, regardless of their motion; and second, that the laws of physics are the same in all inertial (non-accelerating) frames of reference. This theory describes how measurements of space and time are relative to the observer's state of motion.

Examples of Usage

• Noun:
  • Einstein's special relativity theory revolutionized our understanding of space and time.
  • The predictions of special relativity theory, such as time dilation, have been confirmed by numerous experiments.
  • Understanding special relativity theory is essential for modern physics.

Advanced Usage

• "The principles of special relativity theory": Refers to the fundamental postulates (constant speed of light, invariance of physical laws) upon which the theory is built.
  • The principles of special relativity theory lead to the conclusion that nothing can travel faster than light.

Variants and Related Words

• Special Relativity (n): The more common, shortened name for the theory.
  • Special relativity deals with frames of reference moving at constant velocity.
• Theory of Special Relativity (n): A fuller, alternative phrasing.
• Relativity (n): The broader scientific concept, which includes both special relativity and general relativity (which deals with gravity and acceleration).

Synonyms

• Einstein's special theory of relativity: A precise synonym.
• STR (n): An initialism sometimes used in technical contexts.

Related Phrases

• Within the framework of special relativity theory: Used to specify that an analysis or prediction is made according to this theory's rules.
  • Within the framework of special relativity theory, mass and energy are equivalent.

Noun

1. a physical theory of relativity based on the assumption that the speed of light in a vacuum is a constant and the assumption that the laws of physics are invariant in all inertial systems