[time-nuts] Einstein Special on PBS

John Miles john at miles.io
Sun Nov 29 16:06:39 EST 2015

It's not exactly a rigorous explanation, but I think it's a good memory aid.  Once you realize that c is a 4D constant rather than a scalar speed, you can work out for yourself which way clock measurements are skewed from various points of view.

-- john, KE5FX

> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Didier
> Juges
> Sent: Sunday, November 29, 2015 11:20 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Einstein Special on PBS
> Wow. So elegantly simple explanation, thanks John!
> On November 27, 2015 2:54:51 PM CST, John Miles <john at miles.io> wrote:
> >So, here's how I finally grokked this stuff.  c, the speed of light in
> >a vacuum, is often spoken of as a "speed limit" that nothing can ever
> >exceed.  That's a bad way to put it, and people who have expressed it
> >that way in popular science writing for 100 years should feel bad.

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