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<div class="moz-cite-prefix">On 24/04/2023 05:16, Lason Resch wrote:<br>
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<blockquote type="cite"
cite="mid:mailman.560.1682309800.847.extropy-chat@lists.extropy.org">I
think we can calculate what the temperature of the ring would be
at 1 AU using the <a
href="http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/stefan.html#c1"
moz-do-not-send="true">Stefan-Boltzmann Law</a>. Incident solar
radiation at 1 AU is 1360 W/m^2. In order to reach an equilibrium
temperature, the ring needs to radiate 1360 W to stop increasing
in temperature. According to the Stefan-Boltzmann Law, we need to
solve for T in this equation: 2*(5.7603*10^-8)*(T^4) = 1360, note
I use 2 here because the ring has two sides to radiate from, one
facing the sun and one facing away from the sun.</blockquote>
<br>
If I may chip in, isn't all this assuming that each node will
absorb, and then must cope with all the incident radiation?<br>
My question would be, why not reflect away what's not needed? A
variable or adjustable reflector could only allow into the node as
much energy as was required. Seems pointless to absorb radiation
that you just need to get rid of again.<br>
<br>
We wrap spacecraft in silver foil to stop them overheading, why not
Matrioshka Brains?<br>
<br>
Ben<br>
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