wu :: forums « wu :: forums - Problme » Welcome, Guest. Please Login or Register. Nov 30th, 2023, 1:35pm RIDDLES SITE WRITE MATH! Home Help Search Members Login Register
 wu :: forums    riddles    microsoft (Moderators: SMQ, Eigenray, ThudnBlunder, Icarus, william wu, Grimbal, towr)    Problme « Previous topic | Next topic »
 Pages: 1 Reply Notify of replies Send Topic Print
 Author Topic: Problme  (Read 2780 times)
tuxilogy
Newbie

Posts: 45
 Problme   « on: May 14th, 2006, 1:37am » Quote Modify

Imagine you are standing in front of a mirror, facing it. Raise your
left hand. Raise your right hand. Look at your reflection. When you
raise your left hand your reflection raises what appears to be his
right
does
not appear to tilt his/her head down. Why is it that the mirror appears
to reverse left and right, but not up and down?
 IP Logged
JocK
Uberpuzzler

Gender:
Posts: 877
 Re: Problme   « Reply #1 on: May 14th, 2006, 3:03am » Quote Modify

http://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi?board=riddles_har d;action=display;num=1043170706

 IP Logged

solving abstract problems is like sex: it may occasionally have some practical use, but that is not why we do it.

xy - y = x5 - y4 - y3 = 20; x>0, y>0.
jwhooper
Newbie

Posts: 5
 Re: Problme   « Reply #2 on: Apr 30th, 2007, 12:23pm » Quote Modify

The mirror is reflecting back the light waves bouncing from your body.  It isn't reversing anything.
 IP Logged
Grimbal
wu::riddles Moderator
Uberpuzzler

Gender:
Posts: 7523
 Re: Problme   « Reply #3 on: May 1st, 2007, 4:35am » Quote Modify

The reflected image is reversed as compared to the model.

But what is reversed is not the left and the right, it is the front and the back.
 IP Logged
HiddenHeart
Newbie

Gender:
Posts: 24
 Re: Problme   « Reply #4 on: Jan 17th, 2008, 4:18am » Quote Modify

Let, you are standing on the positive xy plane and your head is towards the positive z axis.
if the positive xz plane is the mirror then only the y axis is reflected on it. so the left seems right on the reflection. [someone might want a rigorous explanation of this which i skip here   ]

but if the xy plane was the mirror. that is if you are standing on a mirror then when you jump up. your image jumps down!

because this time the positive z axis is reflected.

only this time the "up is down' effect is observed.

 « Last Edit: Jan 17th, 2008, 4:19am by HiddenHeart » IP Logged
anglia
Junior Member

Gender:
Posts: 60
 Re: Problme   « Reply #5 on: Aug 11th, 2015, 5:28am » Quote Modify

There is only a one logic. Nothing is reversed in this. The light which is reflected from mirror is getting bounced from your body.
 IP Logged

ebooks
 Pages: 1 Reply Notify of replies Send Topic Print

 Forum Jump: ----------------------------- riddles -----------------------------  - easy   - medium   - hard   - what am i   - what happened => microsoft   - cs   - putnam exam (pure math)   - suggestions, help, and FAQ   - general problem-solving / chatting / whatever ----------------------------- general -----------------------------  - guestbook   - truth   - complex analysis   - wanted   - psychology   - chinese « Previous topic | Next topic »