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What color are these dots?! 🤔 - Video học tiếng Anh
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What color are these dots?! 🤔
What color are these dots?! 🤔
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คำบรรยาย (47)
0:00
- Hey, how's it going?
0:02
Hey, what's up? I'm down here.
0:05
Hey guys over here.
0:09
What color am I? Wait, are we all the same color?
0:14
You've just experienced One of the wildest illusions
0:17
that I've seen in a long time.
0:19
All nine of those dots
0:20
and all of my faces are the exact same color.
0:24
But if you have normal color vision, I bet
0:26
that whichever one you are staring at looks purple
0:29
and the ones around it look more blue.
0:31
This illusion isn't just freaky.
0:33
It reveals something really weird about
0:35
how our eyes are built
0:36
and how your brain has sort of been lying
0:38
to you your entire life.
0:39
Here's what's going on. Right in the dead center
0:42
of your retina, in the back of your eye, the spot
0:44
that you're using right now to read these words
0:47
or look at my face,
0:48
that spot has almost no blue light detecting cells.
0:52
Now, purple is just red plus blue, right?
0:55
That lack of blue light detecting cells means
0:57
that when you stare directly at a purple dot, the middle
1:01
of your eye picks up more of the red, half of the signal.
1:03
It's a brighter, more saturated purple and less blue,
1:06
but your peripheral vision has more full blue coverage,
1:10
so the dots you aren't looking at,
1:12
they stay a more bluish hue.
1:14
The highest resolution part of your eye has a blind spot
1:17
for blue, and that's not all.
1:19
There's another weird anatomical oddity going on.
1:22
On the front of the dead center of your retina,
1:24
there's this protective layer of yellow pigments, sort
1:27
of like a, an internal ultraviolet filter,
1:30
and it filters out even more of the blue.
1:32
This works on bigger grids of dots.
1:34
Two, wherever you move your eye, this sort
1:37
of purple cloud follows you.
1:39
It even works with text. It's like a living page.
1:43
What's really wild is you've been walking around
1:45
with this flaw in your eye your entire life,
1:48
and you've never noticed it
1:49
because your brain already knew about it.
1:52
It's been quietly correcting everything in the background,
1:55
and until you watch this video, you had no idea.
1:58
Follow me for more cool science videos.
