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Re: Does Intelligent Life Exist On Earth?

Cross-posted to 4 groups.

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Sergio wrote:
> 
> On 3/16/2018 2:03 PM, Keith Stein wrote:
> > On 16/03/2018 06:15, The Starmaker wrote:
> >
> >> See what they say.
> >
> > Let us, for the sake of argument, assume that i am on a galaxy which is
> > 10,000,000,000 light years from the earth. By a bit of good
> > planning i have my laser with me and i shine this laser at you for a
> > whole year. The front of this laser beam will take exactly
> > 10,000,000,000 to reach you here on Earth (hopefully you will still be
> > alive eh!). The rear end of my laser signal will take slightly longer to
> > reach you because the speed of light has decreased in the year i've been
> > holding this laser. If light decreases by my suggestion of one part in
> > 10 billion per year, the rear end of the signal will take exactly
> > 10,000,000,001 years to reach you here on Earth.
> >
> > Thus the light beam from my laser is stretch by a factor of 2 ( because
> > the end of the beam left 1 year after the start, and took 1 year longer
> > on the journey.). However the number of waves sent will be exactly the
> > same as the number received, (assuming you are careful and don't miss
> > any,) so the wavelength must also have been stretched by a factor of 2.
> > This is equivalent to a red-shift of 1, and corresponds reasonably well
> > with what is found in practice, in our observatories.
> >
> > Talking Rock eh!
> 
> if your laser has a divergance of  0.01 mrad  how much path loss is
> there (1/d^2) over 10,000,000,000 light years ?
> 
> How much power output is needed at your laser to be detectable on earth
> using a photomultiplier tube ?

Do you have any idea how many people can get by life without ever knowing the answer to that?


Have you ever seen a two headed elephant??

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Thread

Does Intelligent Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-15 23:15 -0700
  Re: Does Intelligent Life Exist On Earth? Hägar <hsahm@yahoo.com> - 2018-03-16 09:25 -0700
  Re: Does Intelligent Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-16 09:39 -0700
    Re: Does Intelligent Life Exist On Earth? Edward Prochak <edprochak@gmail.com> - 2018-03-16 10:19 -0700
  Re: Does Intelligent Life Exist On Earth? Keith Stein <keithstein111@gmail.com> - 2018-03-16 19:03 +0000
    Re: Does Intelligent Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-16 14:53 -0700
    Re: Does Intelligent Life Exist On Earth? "reber G=emc^2" <herbertglazier0@gmail.com> - 2018-03-16 18:33 -0700
      Re: Does Intelligent Life Exist On Earth? "hanson" <hanson@quick.net> - 2018-03-16 20:12 -0700
    Re: Does Intelligent Life Exist On Earth? Sergio <invalid@invalid.com> - 2018-03-16 21:32 -0500
      Re: Does Intelligent Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-16 21:21 -0700
      Re: Does Intelligent Life Exist On Earth? benj <benj@nobody.net> - 2018-03-17 02:08 -0400
        Re: Does Intelligent Life Exist On Earth? Sergio <invalid@invalid.com> - 2018-03-17 09:52 -0500
  Re: Does Intelligent Life Exist On Earth? Keith Stein <keithstein111@gmail.com> - 2018-03-16 19:12 +0000
    Re: Does Intelligent Life Exist On Earth? Térov Balónky <iytn@yeicenlw.ik> - 2018-03-16 21:01 +0000
    Re: Does Intelligent Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-16 15:15 -0700
  Re: Does Intelligent Life Exist On Earth? Keith Stein <keithstein111@gmail.com> - 2018-03-16 23:02 +0000
  Re: Does Intelligent Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-16 21:33 -0700
    Re: Does Intelligent Life Exist On Earth? Keith Stein <keithstein111@gmail.com> - 2018-03-19 08:45 +0000
      Re: Does Intelligent Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-19 09:22 -0700
        Re: Does  Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-23 10:46 -0700
          Re: Does  Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-24 10:21 -0700
          Re: Does  Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-25 00:54 -0700
            Re: Does  Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-25 00:59 -0700
              Re: Does  Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-25 20:48 -0700
                Re: Does  Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-26 00:06 -0700
                Re: Does  Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-26 19:00 -0700
                Re: Does  Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-27 10:37 -0700
                Re: Does  Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-27 15:51 -0700
                Re: Does  Life Exist On Earth? The Starmaker <starmaker@ix.netcom.com> - 2018-03-27 23:30 -0700
      Re: Does Intelligent Life Exist On Earth? "hanson" <hanson@quick.net> - 2018-03-22 13:29 -0700
        Re: Does Intelligent Life Exist On Earth? Keith Stein <keithstein111@gmail.com> - 2018-03-23 01:41 +0000
        A more considered response to Mr.Hanson Keith Stein <keithstein111@gmail.com> - 2018-03-25 11:00 +0100
          Re: A more considered response to Mr.Hanson "hanson" <hanson@quick.net> - 2018-03-25 13:26 -0700
      Re: Does Intelligent Life Exist On Earth? Edward Prochak <edprochak@gmail.com> - 2018-03-22 15:16 -0700
        Re: Does Intelligent Life Exist On Earth? Edward Prochak <edprochak@gmail.com> - 2018-03-23 06:17 -0700
          Re: Does Intelligent Life Exist On Earth? Keith Stein <keithstein111@gmail.com> - 2018-03-23 14:49 +0000

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