referenciakeretét

A referenciakeretét, sometimes translated as "reference framework" or "frame of reference," is a fundamental concept in physics and mathematics. It describes a coordinate system or a set of physical conditions within which measurements are made or events are described. The choice of a referenciakeretét is crucial because physical quantities like position, velocity, and acceleration can have different values depending on the observer's referenciakeretét.

In classical mechanics, the concept of inertial referenciakeretét is particularly important. An inertial referenciakeretét is one in which an object at rest stays at rest and an object in motion continues in motion with constant velocity, unless acted upon by a force. This is essentially Newton's first law of motion. Non-inertial referenciakeretét, on the other hand, are accelerating frames of reference, and observations within them require the introduction of fictitious forces to explain observed motion.

Einstein's theory of relativity extended the concept of referenciakeretét with the principle of relativity. Special relativity states that the laws of physics are the same for all observers in uniform motion (inertial referenciakeretét). General relativity further posits that the laws of physics are also the same for observers in any state of motion, including accelerated motion, by incorporating gravity as a curvature of spacetime. Therefore, the referenciakeretét is not just a coordinate system but also encompasses the observer's state of motion relative to the universe.