[ExI] The Great Silence again

[spike]

-----Original Message-----
From: extropy-chat-bounces at lists.extropy.org
[mailto:extropy-chat-bounces at lists.extropy.org] On Behalf Of Keith Henson
...

Aluminum has a density of 2700 kg/cubic meter so if the shell were made of
Al, it would be .001568 kg/m^2/2700 kg/m^3 or 5.8 x 10-7 meters thick.

Or 580 nm thick... Keith


I got the 600 nm number.  The scheme I had in mind uses thicker reflectors
however.