[Wien] Very elemental questions...

[zubaer]

On Wed, Mar 5, 2008 at 10:47 PM, Chandrika <rcais at cal3.vsnl.net.in> wrote:

> The reflection of my nose and the middle of my body is at at the central
> plane (of symmetry) and is not displaced right or left in the mirror. So
> there cannot be an inversion. Lateral inversion
> is only to the left and right of the normal. I can look upside-down only
> if
> I am in front of a convex or concave mirror.


Just to  note: in front of a convex or concave mirror your whole picture
will be elongated or shortened on the mirror. It will not give you a
upside-down image, I think.

>
> Am I right Gerhard?
> Chandrika
> ----- Original Message -----
> From: "Gerhard Fecher" <fecher at uni-mainz.de>
> To: "A Mailing list for WIEN2k users" <wien at zeus.theochem.tuwien.ac.at>
> Sent: Wednesday, March 05, 2008 3:57 PM
> Subject: Re: [Wien] Very elemental questions...
>
>
> Seems I have to make the question more complicated.
>
> Do you have a mirror and a friend at hand ?
> Ok then go put your friend between you and the mirror such that he or she
> faces the mirror,
> try to answer my question again.
>
> You've got it ?
>
>
> have fun
> Gerhard
>
>
>
> ________________________________________
> Von: wien-bounces at zeus.theochem.tuwien.ac.at
> [wien-bounces at zeus.theochem.tuwien.ac.at] im Auftrag von Philippe Moreau
> [Philippe.Moreau at cnrs-imn.fr]
> Gesendet: Mittwoch, 5. März 2008 10:24
> An: A Mailing list for WIEN2k users
> Betreff: Re: [Wien] Very elemental questions...
>
> Jiri Bursik a écrit :
> > Dear Florent,
> > the question was not that simple: Gerhard didn't propose having BOTH
> > left<-->right exchanged AND up<-->down exchanged. You can really see
> > EITHER left<-->right exchange OR up<-->down exchange in the mirror. It's
> > the matter of taste. Man is mostly vertical standing in front of the
> > mirror, that's probably why he/she tends to prefer automatically think
> > about left<-->right exchange. (Or has it more to do with position of
> > eyes? Or has it more to do with fixed floor and easier rotation than
> > turning upside down?)
> >
>
> Hi,
> seems to me that it is a matter of definition. You say that your
> right/left hand are exchange because when you look at the image in th
> mirror the left hand is situated on the left of your virtual body. This
> hand being on the your right hand side in the real you...
> Now , for your head: if you define your head as the thing on the left
> hand side of your heart (when you look at your heart sitting on the
> middle of your chest). Then, in the mirror, your head is at your feet.
> Thank God for that...
>
> Philippe
>
> --
> Dr. Philippe MOREAU
>
> Maître de Conférences à l'Université de Nantes
>
> Institut des Matériaux Jean Rouxel
> Equipe: Stockage et transformations électrochimiques de l'énergie (ST2E)
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> FRANCE
>
> Tel. +33 (0)2 40 37 64 14
> Fax +33 (0)2 40 37 39 95
> http://www.cnrs-imn.fr/index_a.htm
> Personal webpage http://www.cnrs-imn.fr/Perso/PMoreau/index.htm
>
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