LOG#012. Michelson-Morley.

During the 19th century, the electromagnetic theory of Maxwell assumed that electromagnetic waves travelled in a medium called ether. The Michelson-Morley experiment was an experiment devoted to detect the ether. We can think about the electromagnetic waves like an analogue … Continue reading

LOG#011. Relativistic accelerations.

Imagine the S’-frame moves at constant velocity (see the frames above this line): relative to the S-frame. In the S’-frame an object moves with acceleration QUESTION: What is the acceleration in the S-frame? Of course it has to be something … Continue reading

LOG#009. Relativity of simultaneity.

Other striking consequence of Lorentz transformations and then, of the special theory of relativity arises when explore the concept of simultaneity. Accordingly to the postulates of relativity, and the structure of Lorentz transformations we can understand the following statement: What … Continue reading

LOG#008. Length contraction.

Once we introduce the postulates of special relativity and we have deduced the generalization of galilean transformations for electromagnetism and mechanics, the Lorentz transformation. We can deduce some interesting results. Suppose we have two events and , whose coordinates of … Continue reading

LOG#006. Lorentz Transformations(II).

These equations define the most general (direct) Lorentz transformations  and we see they are not those in the previous post! I mean, they are not the one with the relative velocity in the direction of one particular axis, as we … Continue reading

LOG#005. Lorentz transformations(I).

For physicists working with objects approaching the light speed, e.g., handling with electromagnetic waves, the use of special relativity is essential. The special theory of relativity is based on two single postulates: 1st) Covariance or invariance of all the physical … Continue reading