Re: Visualizing

From	Martin Brown <'''newspam'''@nonad.co.uk>
Newsgroups	sci.electronics.design
Subject	Re: Visualizing
Date	2024-09-07 18:16 +0100
Organization	A noiseless patient Spider
Message-ID	<vbi1p3$1eo17$1@dont-email.me> (permalink)
References	<6u4mdjt3d32biaavd02a2cfebsgtd5kapa@4ax.com> <vbf5ti$s3c0$2@dont-email.me> <vbhrq4$1dr0r$1@dont-email.me> <fduodjdvhe91dtg6qm7jm3tchm5pm7tatj@4ax.com>

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On 07/09/2024 17:07, john larkin wrote:

> I suppose that being nearsighted has social-evolutionary advantages.
> Some people shoot arrows, some people make arrows.

Having extreme visual acuity was highly prized back in the days before 
there were optical aids. Roman centurions had an eye test for lookouts 
based on splitting the close double epsilon Lyra (which is at the limit 
3' arc of the human eye). I could do it when I was younger.

A very small number of children and young adults can see the Galilean 
moons of Jupiter at greatest extension from the planet (a feat that most 
people need a telescope or binoculars for hence Galileo's discovery). 
Seeing them against the planet's glare requires both good optical figure 
lens and very clear fluid gel in the eyeball.

Splitting Alcor & Mizar in the plough is easy by comparison (anyone with 
20/20 vision should be able to do that). Ancients used it that way too.

https://en.wikipedia.org/wiki/Mizar_and_Alcor

-- 
Martin Brown

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Visualizing john larkin <jlarkin_highland_tech> - 2024-09-06 07:53 -0700
  Re: Visualizing Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-06 15:08 +0000
    Re: Visualizing Jan Panteltje <alien@comet.invalid> - 2024-09-07 07:04 +0000
      Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-07 07:39 -0700
        Re: Visualizing Jan Panteltje <alien@comet.invalid> - 2024-09-08 06:44 +0000
          Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-08 09:39 -0700
            Re: Visualizing Jan Panteltje <alien@comet.invalid> - 2024-09-09 06:02 +0000
              Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-09 08:59 -0700
              Re: Visualizing Cursitor Doom <cd999666@notformail.com> - 2024-09-10 19:54 +0000
                Re: Visualizing Bill Sloman <bill.sloman@ieee.org> - 2024-09-11 12:37 +1000
    Re: Visualizing Martin Brown <'''newspam'''@nonad.co.uk> - 2024-09-07 16:34 +0100
      Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-07 09:07 -0700
        Re: Visualizing Martin Brown <'''newspam'''@nonad.co.uk> - 2024-09-07 18:16 +0100
          Re: Visualizing Jeroen Belleman <jeroen@nospam.please> - 2024-09-07 23:06 +0200
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  Re: Visualizing Joe Gwinn <joegwinn@comcast.net> - 2024-09-06 11:27 -0400
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          Re: Visualizing Don Y <blockedofcourse@foo.invalid> - 2024-09-06 12:00 -0700
            Re: Visualizing "Edward Rawde" <invalid@invalid.invalid> - 2024-09-06 15:11 -0400
              Re: Visualizing Don Y <blockedofcourse@foo.invalid> - 2024-09-06 12:17 -0700
            Re: Visualizing john larkin <jl@650pot.com> - 2024-09-06 12:23 -0700
        Re: Visualizing john larkin <jl@650pot.com> - 2024-09-06 12:19 -0700
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            Re: Visualizing Ralph Mowery <rmowery42@charter.net> - 2024-09-07 10:03 -0400
              Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-07 07:50 -0700
                Re: Visualizing Bill Sloman <bill.sloman@ieee.org> - 2024-09-08 01:46 +1000
                Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-07 09:15 -0700
                Re: Visualizing Bill Sloman <bill.sloman@ieee.org> - 2024-09-08 16:55 +1000
                Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-08 09:35 -0700
                Re: Visualizing Bill Sloman <bill.sloman@ieee.org> - 2024-09-09 14:54 +1000
                Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-08 22:06 -0700
                Re: Visualizing Bill Sloman <bill.sloman@ieee.org> - 2024-09-09 17:48 +1000
                Re: Visualizing Ralph Mowery <rmowery42@charter.net> - 2024-09-07 12:08 -0400
                Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-07 09:21 -0700
                Re: Visualizing Don Y <blockedofcourse@foo.invalid> - 2024-09-07 10:25 -0700
              Re: Visualizing Don Y <blockedofcourse@foo.invalid> - 2024-09-07 10:17 -0700
      Re: Visualizing wmartin <wwm@wwmartin.net> - 2024-09-06 12:06 -0700
        Re: Visualizing john larkin <jl@650pot.com> - 2024-09-06 12:29 -0700
      Re: Visualizing Joe Gwinn <joegwinn@comcast.net> - 2024-09-06 19:21 -0400
        Re: Visualizing Don Y <blockedofcourse@foo.invalid> - 2024-09-06 18:19 -0700
        Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-07 08:38 -0700
          Re: Visualizing Joe Gwinn <joegwinn@comcast.net> - 2024-09-07 14:18 -0400
            Re: Visualizing Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-07 19:06 -0400
        Re: Visualizing Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-07 18:50 -0400
          Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-07 17:01 -0700
            Re: Visualizing Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-08 00:09 +0000
              Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-07 20:44 -0700
      Re: Visualizing Jan Panteltje <alien@comet.invalid> - 2024-09-07 07:29 +0000
        Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-07 07:56 -0700
          Re: Visualizing Jan Panteltje <alien@comet.invalid> - 2024-09-08 07:02 +0000
            Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-08 09:27 -0700
              Re: Visualizing Jan Panteltje <alien@comet.invalid> - 2024-09-09 06:25 +0000
                Re: Visualizing john larkin <jl@650pot.com> - 2024-09-09 11:59 -0700
                Re: Visualizing Bill Sloman <bill.sloman@ieee.org> - 2024-09-10 15:13 +1000
  Re: Visualizing "Edward Rawde" <invalid@invalid.invalid> - 2024-09-06 11:42 -0400
    Re: Visualizing Clive Arthur <clive@nowaytoday.co.uk> - 2024-09-06 16:55 +0100
    Re: Visualizing Don Y <blockedofcourse@foo.invalid> - 2024-09-06 11:14 -0700
      Re: Visualizing "Edward Rawde" <invalid@invalid.invalid> - 2024-09-06 14:47 -0400
        Re: Visualizing Don Y <blockedofcourse@foo.invalid> - 2024-09-06 11:58 -0700
          Re: Visualizing "Edward Rawde" <invalid@invalid.invalid> - 2024-09-06 15:07 -0400
  Re: Visualizing Joerg <news@analogconsultants.com> - 2024-09-06 16:08 -0700
    Re: Visualizing Joe Gwinn <joegwinn@comcast.net> - 2024-09-07 13:50 -0400
      Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-08 09:41 -0700
  Re: Visualizing Jan Panteltje <alien@comet.invalid> - 2024-09-07 06:58 +0000
    Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-07 08:26 -0700
      Re: Visualizing Jan Panteltje <alien@comet.invalid> - 2024-09-08 07:14 +0000
        Re: Visualizing john larkin <jlarkin_highland_tech> - 2024-09-08 09:13 -0700
  Re: Visualizing brian <nospam@b-howie.co.uk> - 2024-09-07 13:10 +0100
  Re: Visualizing Cursitor Doom <cd999666@notformail.com> - 2024-09-08 15:56 +0000

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