On 11/9/2025 4:04 PM, Alan Grayson wrote:
On Sunday, November 9, 2025 at 2:14:22 PM UTC-7 Brent Meeker wrote:
Forget GR. Ask yourself where would it go in an expanding
Newtonian universe?
Brent
*My conjecture is that the lost energy is absorbed into the
surrounding space. To claim it "disappears" is to indulge in magic. AG *
You think EM radiation is absorbed into space. How is this different
than "it disappears"; is the space heated up?
Brent
On 11/9/2025 1:37 AM, Alan Grayson wrote:
Since photons are redshifted as the universe expands, this is
offered to support the claim that energy is not conserved in GR.
When I asked where the lost energy goes, the answer offered is
that it "disappears". I find this answer woefully insufficient
for the following reason: if energy in GR is not conserved, it
just means that a photon's energy changes as the universe
expands. No matter at what time in the evolution of the universe,
the photon's energy remains unchanged*if it's conserved*. That
is, conservation of energy means the photon's energy remains
unchanged. It doesn't say the lost energy "disappears". So the
open question IMO is this; where does the lost energy go, and GR
does not answer this question. AG --
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