On Friday, May 8, 2020 at 1:45:15 PM UTC-6, smit joshi wrote: > > Just a laymen curiosity > Alan Gray by your thought that "When an expanding gas cools, doesn't the > energy go into work done to cause the expansion". Let us assume that the > energy loss of red shift fuels the expansion of our universe. We know that > E=hc/(lamda) and derivative of energy w.r.t wavelength is -hc/(lamda)^2 so > as wavelength increase the loss in energy decreases so the rate of > expansion should decelerate rather than accelerating. > So I think we cannot compare this two observations. >
The expansion is probably not caused solely by loss of energy by photons as I *hypothesized*. It could also be caused by dark energy, which we know virtually nothing about, and is more or less a placeholder to explain repulsive gravity. AG > > > On Fri, May 8, 2020 at 6:35 PM Alan Grayson <[email protected] > <javascript:>> wrote: > >> >> >> On Friday, May 8, 2020 at 5:33:53 AM UTC-6, Bruce wrote: >>> >>> On Fri, May 8, 2020 at 9:02 PM Alan Grayson <[email protected]> wrote: >>> >>>> On Friday, May 8, 2020 at 4:24:36 AM UTC-6, Bruce wrote: >>>>> >>>>> On Fri, May 8, 2020 at 7:11 PM Alan Grayson <[email protected]> >>>>> wrote: >>>>> >>>>>> On Friday, May 8, 2020 at 2:56:50 AM UTC-6, Bruce wrote: >>>>>>> >>>>>>> On Fri, May 8, 2020 at 6:00 PM Alan Grayson <[email protected]> >>>>>>> wrote: >>>>>>> >>>>>>>> If it's not conserved, as seems implied by the red shift due to >>>>>>>> expansion, where does it go? TIA, AG >>>>>>>> >>>>>>> >>>>>>> Silly question. If it is not conserved, it does't have to go >>>>>>> anywhere -- it just vanishes. >>>>>>> >>>>>>> Bruce >>>>>>> >>>>>> >>>>>> When an expanding gas cools, doesn't the energy go into work done to >>>>>> cause the expansion? Is it your opinion then, that something cannot come >>>>>> from nothing, but something can become nothing? AG >>>>>> >>>>> >>>>> >>>>> That's what non-conservation means -- something can come from nothing >>>>> and go to nothing. >>>>> >>>>> Bruce >>>>> >>>> >>>> If you believe in what's called "evidence", and extrapolating from it >>>> to create a hypothetical physical theory, can you give a single example of >>>> something coming from nothing? AG >>>> >>> >>> Two examples. The universe; Dark energy. >>> >>> Bruce >>> >> >> We have no clue how the universe began, or even IF it began; and we have >> zero understanding of dark energy, other than it probably exists and >> gravitationally interacts with ordinary matter. Where's the rigor? AG >> >> -- >> 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] <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/everything-list/d4d24ff0-aa11-4a19-a2a5-00052afa0491%40googlegroups.com >> >> <https://groups.google.com/d/msgid/everything-list/d4d24ff0-aa11-4a19-a2a5-00052afa0491%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- 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/53f33221-9df8-4cea-b175-81353e1a6b39%40googlegroups.com.
