[ExI] Gravitational Waves Detected By LIGO!
gsantostasi at gmail.com
Thu Feb 11 19:07:06 UTC 2016
GW interacts with matter very, very, very weakly. So unless you are really
close to the event you would not be impacted.
Few event horizons radii away from the source and the GW become
ridiculously small in terms of strain.
In the radiation zone the strain h goes down linearly with distance. I can
do more precise calculations but GW are so difficult to detect exactly
because they don't interact strongly with matter.
On Thu, Feb 11, 2016 at 12:50 PM, spike <spike66 at att.net> wrote:
> *From:* extropy-chat [mailto:extropy-chat-bounces at lists.extropy.org] *On
> Behalf Of *Anders Sandberg
> >…If we assume the energy release was around 10^50 J over a second, then
> the power per square meter at distance d is 10^50/(4 pi r^2) Watts. So the
> criticial distance if the danger power is P is r=sqrt(10^50/4 pi P). If we
> assume a megawatt/m^2 is enough to cause biosphere damage, then the
> distance is 298,000 lightyears. To wipe out more advanced civilizations I
> would expect a much higher P; for a gigawatt the range is 9,400 lightyears
> - bad in the central part of a galaxy, but not even covering it…
> Anders, cool, but we need to know how GW energy would interact with matter
> before we conclude that it would nuke biomes.
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> extropy-chat at lists.extropy.org
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