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Lateral Puzzles » Solved Lateral Thinking Puzzles » Solved Puzzles - April 2005 » The Great Wall of China « Previous Next »

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Virpi Luukkonen (Virpi)
Posted on Wednesday, April 13, 2005 - 1:22 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Hi! I'm a new user..
Here's a puzzle:
A man is outdoors taking a walk. Suddenly he sees the Great Wall of China. How is this possible, since he is thousands of miles from China?
(Stuccosalt)
Posted on Wednesday, April 13, 2005 - 1:58 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Is he on the moon?
(Stuccosalt)
Posted on Wednesday, April 13, 2005 - 1:59 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

And hi, by the way! Welcome aboard!
Sam Greene (Pandora)
Posted on Wednesday, April 13, 2005 - 2:34 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Hi and welcome to the forum :)

Did he see it on a TV screen in a high street?
Kapil Kapur (Dinkie)
Posted on Wednesday, April 13, 2005 - 2:48 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

is he an astronaut ? out for a space walk ?
Virpi Luukkonen (Virpi)
Posted on Thursday, April 14, 2005 - 6:59 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Thanks guys and yes... you guessed it. This one was rather easy, I think. I'll come up with something more difficult next time :-)

/b{******** SPOILER ***********
The man was walking on the moon and saw the Great Wall from there, as it is the single man-made structure visible to outer space.}
Kapil Kapur (Dinkie)
Posted on Thursday, April 14, 2005 - 8:51 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

oops sorry for guessing it so early !!!!
Benjamin Moore (Zenith)
Posted on Thursday, April 14, 2005 - 9:09 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

In fact, it is actually a myth that the Great Wall of China is visable from the moon.

The following got printed in New Scientist Last Word.


Quote:

A person with perfect eyesight is able to resolve up to about one minute of arc without binoculars or a telescope. The Great Wall of China is, very approximately, 20 feet (6 metres) wide. This means that it is not directly visible above about 70,000 feet (20Km), or just over twice the height of Mount Everest. Even if its shadow is taken into account, this would only make it visible, in places, up to perhaps about 200,000 feet (60km) at the most which, because of atmospheric drag, is still below the height necessary for a stable orbit.


(Stuccosalt)
Posted on Thursday, April 14, 2005 - 1:18 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Dinkie - It's hard to tell sometimes how puzzles will go over - I've written some that I've thought were completely diabolical that were solved in a question or two, and others that I noted as "Quickies" that took forever -- just depends what track everyone gets on. I look forward to your next puzzle!
(Stuccosalt)
Posted on Thursday, April 14, 2005 - 1:24 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Zenith - I heard that a while ago, and as I remember, it turned out the Great Wall is less visible than a number of other manmade structures from space:

See
http://www.snopes.com/science/greatwal.htmSnopes</a>.
(Stuccosalt)
Posted on Thursday, April 14, 2005 - 1:24 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

sorry, should've just read http://www.snopes.com/science/greatwal.htm

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