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What makes propagation speed of electromagnetic waves in a vacuum constant?
According to Relativity, it is an axiom. It is accepted without controversy.
Quote from: MordethAccording to Relativity, it is an axiom. It is accepted without controversy. That's what I just said. All laws of physics are axioms.
That's what I just said. All laws of physics are axioms.
I beg to differ.
An axiom or postulate is a premise or starting point of reasoning. As classically conceived, an axiom is a premise so evident as to be accepted as true without controversy.
identified two fundamental principles, the principle of relativity and the principle of the constancy of light (light principle), which ostensibly served as the axiomatic basis of his theory.
a rule or principle that many people accept as true1: a maxim widely accepted on its intrinsic merit 2: a statement accepted as true as the basis for argument or inference : postulate 3: an established rule or principle or a self-evident truth
So, it is not possible to generate electromagnetic waves which propagates slower than light in vacuum or is it?
That's why some authors will differ regarding the terms "postulate" and "law". Axiom is just another term meaning the same exact thing - by definition.
So the answer to your question is : Nobody knows why the speed of light is the same for all inertial observers.
OK, what determines 300kkkm/s, vacuum or something in the mechanism of creation?
Quote from: mathew_orman on 17/09/2015 08:53:01OK, what determines 300kkkm/s, vacuum or something in the mechanism of creation?Maybe you put too many "k" ? The "numerical value" of every physical quantity is determined by its units of measure, so it hasn't any physical meaning. You can define units of measure where light speed has the numerical value that you prefer, e.g. 1, or 123456789 or 0.987654321 or sqrt(2), etc.What has physical meaning about light speed is the fact it's finite and invariant.--lightarrow