Re: Why is the Speed Of Light Constant?


G wrote:
Thanks SCW for the response

But I mean what I said

So what Einstein said was that

Rule 1. light travels through space at a velocity c
Rule 2. In case rule 1 is wrong assume that time has contracted or
dilated in order to make rule 1 true

Am I right?

No, this is not right.
The rules are:
Rule 1: Light travels in vacuum at c, regardless of who is doing the
measurement.
Rule 2: The laws of physics are the same, regardless of who is doing
the measurement.
(where "regardless of who" spans the set of inertial reference frames)

As a consequence of these rules, one finds that two different reference
frames will always agree on these two things but that they will not
agree on length or duration.

PD


G

.

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