Which of these is a correct and complete statement of Einstein's first postulate of special relativity?
A) One's description of physical reality is the same regardless of the constant velocity at which one moves.
B) One's description of physical reality is the same regardless of the direction in which one moves, even if the speed changes.
C) One's description of physical reality is the same regardless of how one moves.
D) One's description of physical reality is the same regardless of the constant speed at which one moves, even if direction changes.

Question

Quizplus · Accepted Answer

Einstein's first postulate of special relativity, also known as the principle of relativity, states that the laws of physics are the same in all inertial frames of reference, which means they hold for all observers moving at constant velocities relative to each other. Option A correctly captures this essence by stating that one's description of physical reality is the same regardless of the constant velocity at which one moves, implicitly including both speed and direction in the term "velocity."

Which of These Is a Correct and Complete Statement of Einstein's