<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Sep 17, 2015 at 6:38 AM, Anders Sandberg <span dir="ltr"><<a href="mailto:anders@aleph.se" target="_blank">anders@aleph.se</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
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In my "spamming the universe" scheme I looked at enormous coilguns, essentially a Dyson sphere with light-second long coilguns (a Dyson urchin?) since they also get around the rocket equation. Eric D pointed out that lasers would be even more effective, and the lens trick could allow focused acceleration for a surprisingly long time.</blockquote><div><br></div><div>### Hm, if you can use stationary lasers to accelerate a moving target, maybe you could use a moving laser or even a non-coherent but directional light source to decelerate itself? What is the light intensity per kilogram of laser needed to decelerate a laser at 1 g? How many orders of magnitude away is it from current specs?</div><div><br></div><div>RafaĆ</div></div>
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