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  1. #1
    Bernardz's Avatar
    Bernardz Guest

    Default Would this work? A Roman telescope mark II



    Say a person fell on the ground at night holding a large silver fruit
    dish. He drops everything. Then he got up to wipe the dirt off himself.
    After doing so, he goes to pick up the dish. As be bends down, he
    suddenly notices that at one point, the moon was much clearer and bigger
    then he has ever seen before. So he starts to investigate..........



    --
    The bouncer causes more fights then anyone at the bar. Yet the roughest
    bars are those without a bouncer.

    Observations of Bernard - No 49




  2. #2
    J.C. Jones's Avatar
    J.C. Jones Guest

    Default Would this work? A Roman telescope mark II

    On Mon, 1 Mar 2004 00:24:08 +1100, Bernardz
    <Bernard_zzz@REMOVEhotmail.com> wrote:

    ---
    Yes, and so was born the fruit dish telescope which culminated with
    the incredible 200 inch fruit dish telescope on Mt. Palomar.....

    Makes you wonder what would have happened if the fruit dish had
    landed upside down....possibly the inention of fruit dish microscope
    or the fruit dish shaving mirror.

    Damned fruit dish, it started a scientific revolution, but we're lucky
    it didn't explode or we may have gotten the 20 megaton fruit dish
    before we could handle the responsibility. However, could you imagine
    what the Romans could have done to those swarming barbarians with
    low-yield nuclear or neutron fruit dishes.

    J.C. Jones

  3. #3
    Bernardz's Avatar
    Bernardz Guest

    Default Would this work? A Roman telescope mark II

    In article <51542dd685122b1cfb91f91f2f0a1554@news.teranews.co m>, J.C.
    Jones <> says...


    Just tell me if it would give a significant magnification and if so how
    much. I can take care of the rest.


    --
    The bouncer causes more fights then anyone at the bar. Yet the roughest
    bars are those without a bouncer.

    Observations of Bernard - No 49




  4. #4
    Roger Hamlett's Avatar
    Roger Hamlett Guest

    Default Would this work? A Roman telescope mark II


    "Bernardz" <Bernard_zzz@REMOVEhotmail.com> wrote in message
    news:MPG.1aada301874eb80f98995d@news...
    bigger
    Unfortunately, the Moon, would not be focussed by such an arrangement. Try
    the experiment with a shaving mirror. A distant object like the Moon,
    requires a second lens/mirror, before a focussed image can be seen. You
    could have somebody look through a droplet of water at such a mirror, and
    see an enlarged image. The magnification would be large in such a setup
    (given the short focal length, that a water drop is likely to have).

    Best Wishes



  5. #5
    Shneor Sherman's Avatar
    Shneor Sherman Guest

    Default Would this work? A Roman telescope mark II

    "Roger Hamlett" <rogerspamignored@ttelmah.demon.co.uk> wrote in message news:<lUE0c.15910$gC2.5462@newsfe5-gui.server.ntli.net>...

    With all due respect, I have to disagree. My 22" mirror is completely
    exposed (see http://www.foothill.net/~sayre/22-in...no%20front.htm)
    and I always see star images reflected off it if I'm in the right
    place. Focus depends on how far I am from the mirror. Remember, the
    eye has a lens too.
    Clear skies,
    Shneor Sherman

  6. #6
    Roger Hamlett's Avatar
    Roger Hamlett Guest

    Default Would this work? A Roman telescope mark II


    "Shneor Sherman" <shneor@my-deja.com> wrote in message
    news:9dedb1fb.0403010719.7d6f2208@posting.google.c om...
    news:<lUE0c.15910$gC2.5462@newsfe5-gui.server.ntli.net>...
    fruit
    himself.
    lucky
    imagine
    how
    Try
    and
    Yes. You can see star images off a flat mirror too. But do you see
    magnification?.

    Best Wishes



  7. #7
    starman's Avatar
    starman Guest

    Default Would this work? A Roman telescope mark II

    Since this Roman era telescope is supposed to be mass produced, I
    wouldn't discount the possibility of making a small (25mm-objective)
    long focus refractor. It would be much less susceptible to being damaged
    or out of collimation. I still think it would be possible to make
    optical quality glass with a small blast furnace, then grind and polish
    the lenses with natural abrasives graded in a water column.


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  8. #8
    Parallax's Avatar
    Parallax Guest

    Default Would this work? A Roman telescope mark II

    "Roger Hamlett" <rogerspamignored@ttelmah.demon.co.uk> wrote in message news:<SVI0c.2361$zu.1457@newsfe1-win>...

    One can easily imagine the curious Roman seeing the concentration of
    sunlight from such a dish deciding to make a parallel beam of such
    light for illumination by use of a second mirror. He would very
    quickly find that he had made a crude telescope.

  9. #9
    William Hamblen's Avatar
    William Hamblen Guest

    Default Would this work? A Roman telescope mark II

    On 2004-03-01, Roger Hamlett <rogerspamignored@ttelmah.demon.co.uk> wrote:


    The answer is yes. A mirror or lens makes a real image that you can see
    without an eyepiece. It's called an aerial images as it is hanging in the
    air so to speak. The magnification is the focal length of the objective
    divided by the distance from your eye to the aerial image. If you had a
    mirror with a focal length of 2500 mm and the distance from your eye to
    the image was 250 mm then you would have a 10 power telescope. Now you
    see why you use eyepieces: to get any kind of useful magnification.


 

 

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