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CHAPTER 35 : EINSTEIN'S THEORY OF SPECIAL RELATIVITY

35.1 Frames of References

The motion of an object can be described with reference to a reference frame only. Without the reference frame the description of motion is meaningless.

The laws of motion however should be such as to remain the same when the transformation change over is made from one to another reference frame, otherwise the laws are not universally capable of explaining motion. If the laws remain same under transformation from one to another reference frame then they are said to be 'invariant'.


Inertial Frames of References

Any frame of reference (co-ordinate system) in which the law of inertia holds good is called the inertial frame of reference.

Non- inertial Frames of References

If the law of inertia does not hold good in the given frame of reference i .e. the objects can be accelerated without real forces being applied to them or can be in state of uniform motion when real forces are applied then such a frame is called non- inertial frame of reference.

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Index

35.1 Frames of References
35.2 Galilean Principle of Relativity and Invariance of Newton's Laws of motion
35.3 Galilean Law of Velocity Addition
35.4 Absolute Frame of Reference
35.5 Einstein's Postulates
35.6 Length Contractrion, Time dilation and Relativistic Law of Velocity Addition
35.7 Relativistic Mass and Mass - Energy Equivalence

Chapter 1





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