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Illusions [Science for Youth]
Transcript of Illusions [Science for Youth]
Brain is arguing with itself
It doesn't know what to do
Color of the word vs the actual word
BUT WHY DOES THIS
Science for Youth
WHAT ARE ILLUSIONS?
Illusions happen when something tricks your brain.
The most common type is one that you've probably already seen – called an
Let's look at a few!
What does the dictionary say?
Which line looks longer?
What do you see where the white lines cross?
Hermann grid illusion
Crooked, or straight?
café wall illusion
THERE ARE 100 BILLION NEURONS IN THE HUMAN BRAIN...
"If our brains were simple enough for us to understand them, we'd be so simple that we couldn't."
– Ian Stewart
properties of the optical cortex
visual system is a process of perception and interpretation
random perspective illusions
We are trained to use certain shapes to determine the size of something
This includes triangle brackets: < >
Brain process called
Excited brain cells (neurons) prevent other brain cells from being excited
of the word, not the actual word
We will time you.
Which one do you think is more important to your brain?
only works when blocks not perfectly lined up
perceived because of the way neurons (especially the ones that respond to orientation) interact
the grey space between the rows of black and white squares is deleted by the brain so you 'see' diagonals
the retina (part of the eye) can tire of a color if exposed for long enough
you will see the complementary color (red <-> green, blue <-> yellow) when exposed to white light
perception is interpretation
knowledge and past experience influences perception
Different, or the same color?
case of experience being used against you
brain believes shadow is being cast over square B, thus B is brighter
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