The 'Big Spanish Castle' Illusion

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Discussion Overview

The discussion revolves around the 'Big Spanish Castle' illusion and other optical illusions, focusing on how these illusions affect perception and the underlying mechanisms involving color receptors and brain processing. Participants share their experiences and reactions to the illusions presented.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants express amazement at the intensity of the illusion and its effects on perception.
  • One participant mentions seeing a face in the clouds after prolonged observation, suggesting a phenomenon related to pareidolia.
  • There are references to other illusions that similarly exploit color receptor fatigue.
  • A participant proposes a theory linking the particle-hole transformation to visual responses to color, although this is met with playful skepticism.
  • Several comments highlight the distinction between the eyes and the brain in processing visual information, emphasizing that optical illusions manipulate brain perception rather than eye function.
  • Participants engage in light-hearted banter about typos and the nature of perception, including humorous references to how certain visual tricks can make mistakes disappear when stared at long enough.
  • A nostalgic anecdote is shared about an electronic slide rule and a playful prank involving spelling "hello" upside down, connecting past experiences with current discussions on perception.

Areas of Agreement / Disagreement

There is no clear consensus among participants; while many share similar experiences of the illusions, differing interpretations and reactions to the effects of these illusions are evident.

Contextual Notes

Participants reference various optical illusions and their effects on perception, but the discussion does not delve into the scientific explanations or definitions of these phenomena.

Who May Find This Useful

Individuals interested in psychology, visual perception, optical illusions, and those who enjoy playful discussions about perception and cognition may find this thread engaging.

neutrino
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This is great. Check it out.

http://www.johnsadowski.com/big_spanish_castle.html
 
Physics news on Phys.org
whoa that is intense...nice find!
 
After about 20 seconds of staring I thought I saw a face in the clouds.
 
Jeff Reid said:
Another one, also based on your color receptors getting fatigued:

cool_illusion.html
That's a pretty famous/popular one.
 
Hey you guys broke it!
 
Goddamit, I just wasted 30 seconds of my time!
 
veryodd1kb.jpg
 
Wow that's cool it looks like it's moving when it isn't.
 
  • #10
Hooray, more support for my theory of the validity of the particle-hole transformation to visual responses to color. (yuck, all those prepositions...preposterous, wot?)
 
  • #11
Connect the black dots.

blackdots4mi.gif
 
  • #12
Ahhhhhh! STOP Messing with my eyes!
 
  • #13
mattmns said:
STOP Messing with my eyes!
It's not your eyes that they playing with it's your brain. The brain thinks it's getting infomation form the eye's that it isn't that is how an opitical illisioun is formed.
 
  • #14
scott1 said:
It's not your eyes that they playing with it's your brain. The brain thinks it's getting infomation form the eye's that it isn't that is how an opitical illisioun is formed.
Yeah, I'm messing with your brain. :devil:
 
  • #15
scott1 said:
It's not your eyes that they playing with it's your brain. The brain thinks it's getting infomation form the eye's that it isn't that is how an opitical illisioun is formed.
Yeah... like how if you stare at that post long enough the spelling mistakes disappear. :-p
 
  • #16
Danger said:
Yeah... like how if you stare at that post long enough the spelling mistakes disappear. :-p
17 4|w4y5 w0rk5 700.
it always woks too.
Edit:How did that one not work?
 
  • #17
y0u 5p311 b3773r wh3n y0u 7yp3 1337 :smile:
 
Last edited:
  • #18
mattmns said:
y0u 5p311 b33773r wh3n y0u 7yp3 1337 :smile:
I noticed that too. Truly scary! :rolleyes:
 
  • #19
:smile: And in that post I made a typo
 
  • #20
And I'm quite irritated that you admitted it before I could pounce on it. :biggrin:
 
  • #21
Reminds me of back in 1972, when a guy named Bill bought one of the first electronic slide rules, a HP 35. A friend spelled hello bill upside down on it and freaked out Bill, with these numbers: 7718 0ll34.
 
  • #22
Jeff Reid said:
Reminds me of back in 1972, when a guy named Bill bought one of the first electronic slide rules, a HP 35. A friend spelled hello bill upside down on it and freaked out Bill, with these numbers: 7718 0ll34.
Yeah, my favorite satellite orbit is circular with a radius of 12,988.1815 km. (actually, you need a pretty cheap calculator for that to work well)
 
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