On Friday, January 31, 2020 at 7:34:18 PM UTC-7, Brent wrote: > > > > On 1/31/2020 12:04 AM, Alan Grayson wrote: > > > > On Thursday, January 30, 2020 at 10:37:13 PM UTC-7, Brent wrote: >> >> >> >> On 1/30/2020 5:37 PM, Alan Grayson wrote: >> >> >> >> On Thursday, January 30, 2020 at 6:29:18 PM UTC-7, Alan Grayson wrote: >>> >>> >>> >>> On Thursday, January 30, 2020 at 5:09:56 PM UTC-7, Brent wrote: >>>> >>>> >>>> >>>> On 1/30/2020 12:45 PM, Alan Grayson wrote: >>>> >>>> >>>> That's not it. I think the two observers, one in a galaxy far removed >>>> and one here, would read the same CMBR "time", regardless of the distant >>>> galaxy's speed of recession. But relativity says otherwise. This is what >>>> puzzles me. AG >>>> >>>> >>>> Ask yourself *when* do they read the same time. >>>> >>>> Brent >>>> >>> >>> I don't know if this helps. Since the temperature of the CMBR is the >>> same everywhere, at any time t, we can in principle determine if the two >>> measurements are simultaneous or not. AG >>> >> >> But regardless of simultaneity or not, there's no dilation of this clock! >> (And AE doesn't say what a clock is.) What the hell is going on? AG >> >> >> The clocks used in relativity examples are the whatever the most perfect >> and stable clock in existence are (in this case cesium atom clocks). They >> always measure proper time thru spacetime. The only reason that when >> compared they seem to register different durations is because they traveled >> different paths thru spacetime and these paths had different proper >> length. "Time dilation" is not some function of the clock...it's a >> function of the path the clock is measuring. Remember my odometer analogy? >> >> Brent >> > > Given that the temperature of the CMBR is the same for every location in > space-time, it follows that time dilation is not a property of THIS clock. > > > Time dilation is a property of one clock (or one path) relative to > another. It's called relatvity theory of a reason. >
*My point is that the CMB "clock" exists everywhere, and that it has no relative motion wrt anything, so how can time dilation be applied to it? AG* > For this clock, which is NOT moving through space-time, paths through > space-time are irrelevant. AG > > Clocks that aren't moving thru spacetime are stopped. You're thinking of > clocks that aren't moving thru space. > *I'm thinking about motion through space. That's what the "v" in the Lorentz transformation means; motion through space. AG * > > Brent > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/94f7ad56-57ab-4741-a6b1-01079b502cde%40googlegroups.com.
