stefan
01-16-2006, 03:53 PM
Thought i would point out an interesting illusion that i accidentally discovered with a friend about 6 years ago or so.
i was showing him some photographs in Stokes' Geology of Utah. One shot was an b/w aerial view of the Goosenecks of the San Juan. Anyhow, we were sitting at a table across from each other with the book between us. I pointed to the river, he responded "What river?" I said "that river there, that's the San Juan river." He responded again, "I just don't see which river you're talking about." I was very confused for a moment, then i decided I better take a look at what HE was looking at.
The book was oriented so the right side up was in line with my view...basically he was looking at it upside down.
When i flipped it around and looked at it i realized why he wasn't seeing it.(see below)
unfortunately i never scanned the Stokes' image, since it is the best one that i have found. but i did manage to find this one on the internet and decided to post it in both orientations for you all to see. (adapted from someone)
maybe you've already seen this sort of phenomenon.
it's amazing how our brains can be tricked. :patch:
if you have the stokes book, take a look at it, it really is the best angle for this sort of thing.
then slowly rotate the book around and see if you can maintain the image upside down, before it snaps back.
once it snaps back, can you make it invert again? i can't.
i was showing him some photographs in Stokes' Geology of Utah. One shot was an b/w aerial view of the Goosenecks of the San Juan. Anyhow, we were sitting at a table across from each other with the book between us. I pointed to the river, he responded "What river?" I said "that river there, that's the San Juan river." He responded again, "I just don't see which river you're talking about." I was very confused for a moment, then i decided I better take a look at what HE was looking at.
The book was oriented so the right side up was in line with my view...basically he was looking at it upside down.
When i flipped it around and looked at it i realized why he wasn't seeing it.(see below)
unfortunately i never scanned the Stokes' image, since it is the best one that i have found. but i did manage to find this one on the internet and decided to post it in both orientations for you all to see. (adapted from someone)
maybe you've already seen this sort of phenomenon.
it's amazing how our brains can be tricked. :patch:
if you have the stokes book, take a look at it, it really is the best angle for this sort of thing.
then slowly rotate the book around and see if you can maintain the image upside down, before it snaps back.
once it snaps back, can you make it invert again? i can't.