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Re: problems with beaming
- To: KellySt@aol.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, David@InterWorld.com, firstname.lastname@example.org, DotarSojat@aol.com
- Subject: Re: problems with beaming
- From: T.L.G.vanderLinden@student.utwente.nl (Timothy van der Linden)
- Date: Sat, 13 Apr 1996 18:42:38 +0100
>Not necessarily, it depends upon what type of laser you are discussing. Two
>types seem to be popular here for two very different reasons. One is a
>simple laser augmented solar sail which is propelled solely by the pressure
>of light. With a properly constructed sail, this can utilize almost ANY
>frequency of radiation, so the easiest way to decrease the aperture would be
>to increase the frequency.
In this case something like far ultra violet or Rontgen waves may decrease
the size of the aperture by a thousandfold (compared to visible light).
Do you know if there are lasers that can transmit EM-radiation with these
>I am not sure if phased array can be applied adequately to shorter
>wavelengths or not. I am not aware of any current research in this area. If
>it can, then lasers also become practical. Solar pumped yellow light lasers
>should be relatively cheap and easy to build and conversion efficiencies and
>loss ratios would not be too much of a concern.
Phased lasers are these femto or pico second lasers, right?
P.S. could you tell me what the ~ in sin(theta)~theta=1.22*lambda/d means?