provisions of this principle applies to the areas of research forces of gravity and inertia.Before us the principle of equivalence - a heuristic principles that apply great Albert Einstein when he was developing his greatest scientific discovery - the general theory of relativity.
In the general view, Einstein's equivalence principle states that the force of the gravitational interaction between objects is directly proportional to the gravitational mass of the body, and the forces of inertia of the same body, in this case, are proportional to the inertial mass of the body.And in the case where both one and the other of body weight are equal, then determine which of the forces acting on the body, is not possible.
To prove these conclusions, Einstein used this experiment.You must visualize that the two bodies are in the elevator.This lift is infinitely far from acting on it gravitating bodies and is accelerated.In this case, all bodies which are in the lift, the inertia force acts, and they will have a certain weight.
If the lift is stationary, the body inside it will also have the weight, and this means that all the mechanical conversion in both elevators will be the same.This effect, Einstein extended to all the phenomena of mechanics, and even the whole of physics, then the conclusion of scientists joined the fundamental principles of equivalence.
Today, some researchers believe that the principle of equivalence can be regarded as a major in the whole theory of relativity, and therefore, the gravitational field is a non-inertial frame of reference.However, such a statement can only be considered valid only in part.The fact that every non-inertial system in the special theory of relativity Einstein's is based on a conventional linear space-time.In the general theory, which includes a metric concept of gravity, the space-time curved.This discrepancy is explained by the fact that the concept of metric does not contain a global inertial systems.Here, the principle of equivalence can manifest itself only in the case, if we neglect the curvature itself.
also advisable to differentiate between strong and weak versions of manifestation of the principle of equivalence, the difference of which is that at small distances between objects specific differences in the laws of nature will not, no matter which of the frames, these objects are.
The fundamentals of this theory, Einstein formulated in 1907.When considering the importance of this principle across the physics should be said that Einstein's discovery continues and develops the approval of Galileo on the acquisition of all bodies, regardless of their weight, the acceleration in the gravitational field.This situation led to the conclusion of the equivalence of inertial mass.Later this equivalence was measured metrically, up until the 12th character.
is important to note that the use of Einstein's discoveries is effective only at low spatial scale, because only under these conditions can be considered the gravity constant.
Einstein extended his principle of equivalence of all reference systems in a state of free fall, as well as more elaborate notions of the local system.This was necessary because of the gravitational field of the universe is everywhere, and the inclination is changeable - it varies from point to point because every point of his peculiar parametric characteristics.Therefore, these systems, according to Einstein, should not be confused with inertial that violates Newton's first law.
