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Special Theory of Relativity
Frame of Reference
A coordinate system relative to which the measurements are taken is known as frame of reference. A coordinate system in which the law of inertial is valid is known as inertial frame of reference, while the accelerated frame is known as non-inertial frame of reference.
Special Theory of Relativity
Postulates of Special Theory of Relativity:
In 1905, Albert Einstein formulated his special theory of relativity in terms of two postulates:
1. Principle of Relativity
The laws of Physics have the same form in all frames of reference moving with constant velocities with respect to one another. It can also be stated as
“The laws of Physics are invariant o a transformation between all inertial frames”
2. Principle of Constancy of Speed of Light
The speed of light in free space has the same value for all observers regardless of their state of motion. It can also be stated as:
The speed of light in free space has the same value “c” in all inertial frames of references.
Relativistic Effects:
Theory of Relativity shows the effects of relative motion on physical quantities. These effects are observed at relativistic speed. (The speed is called relativistic speed, where c is speed of light.)
Discussion:
The first postulate shows that laws of Physics are absolute and universal and are same for all inertial observers. So the laws of Physics that hold for one inertial observer can’t be violated for any other inertial observer.
