Ok so a person turning around changes the image axis as your
right and left reverse. When I first read the OB comment I went to a
mirror then I raised my right hand to my right ear and it was still on the right
side in the mirror image but holding a bottle of Listerine up produced the words
backward. I'm looking straight into the mirror so my axis of perception has not
changed. Why do the word on the Listerine show up backwards?
Roy
In a message dated 11/18/2011 4:35:43 P.M. Eastern Standard Time,
eichhorn@xxxxxx writes:
Mirror image
If one looks in a mirror, one's image
reverses (e.g., if one raises one's right hand, his left hand will appear to
go up in the mirror). However, a mirror does not "swap" left and right, any
more than it swaps top and bottom. A mirror reverses the forward/backward
axis, and we define left and right relative to front and back. Flipping
front/back and left/right is equivalent to a rotation of 180 degrees about the
vertical axis (in the same way that text which is
back-to-front andupside-down simply looks like it has been
rotated 180 degrees on the page). Therefore, looking at an image of oneself
with the front/back axis flipped is the same as looking at an image with the
left/right axis flipped and the whole figure rotated 180 degrees about the
vertical axis, which is exactly what one sees when standing in front of a
mirror.
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