# Category Archives: Relativity

## Einstein mass energy relation discussion and derivation

Einstein’s mass energy relation: You must have known the relation E = mc2. Let us derive it: Derivation: Consider an object of rest mass m’. If force is applied to the object such that it starts moving with relativistic velocity … Continue reading

## Time dilation in relativity derivation

Last time we have discussed and derive the length contraction in relativity, let us today discuss the concept of time dilation and derive the relation for time dilation. Let us today discuss and derive an interesting concept in relativity called … Continue reading

## Length contraction in relativity derivation

Let us today discuss and derive an interesting concept in relativity called the length contraction. You must be astonished to know that when an object moves with a speed comparative to the speed of light, its length contracted or more … Continue reading

## Einstein postulates of theory of relativity

Explanation of the negative results of the Michelson-Morley experiment: As the theoretical results of the M-M experiment did not match with the experimental results (Theoretically fringe shift result was not zero, it was about 0.4 but the experimentally it was … Continue reading

## Galilean transformation equations derivation

Let there are two inertial frames of references S and S’. S is the stationary frame of reference and S’ is the moving frame of reference. At time t=t’=0 that is in the start, they are at the same position … Continue reading

## The concept of Relativity and frames of reference

The concept of Relativity and frames of reference: The term relativity comes from the word “relative that is in relation”. In this universe, everything is relative, there is nothing like absolute rest. If you think that you are sitting somewhere … Continue reading