00:00Okay, look at the center of the cross.
00:02No, don't get distracted by the celebrity's glam.
00:06Just keep staring at the cross.
00:08Go on, just a little longer.
00:11And suddenly, something weird starts happening.
00:14Those faces go from red-carpet gorgeous to downright bizarre, right?
00:19What kind of creepy spell is at work here?
00:21Well, we promise you, we didn't do any Photoshop magic.
00:24Look, if we stop this crazy roulette, and you focus on the photos, you'll see that
00:29Miley Cyrus still looks great.
00:31This optical illusion is known as the flash face distortion effect.
00:36Basically, these photos are arranged in a way that totally messes with our heads, and
00:40our brains love to compare things.
00:43So when the images switch really fast, and you see someone with a tiny nose right after
00:48someone with a regular nose, your brain gets confused.
00:52Suddenly a normal nose can look as huge as Pinocchio's.
00:55The same goes for lips, eyes, you name it.
00:58Since our brains are always comparing each face to the one before, they end up turning
01:02these beautiful celebrities into exaggerated creepy cartoon versions of themselves.
01:08So, tell me, what do you see here?
01:12A horse or a seal?
01:13It partly depends on where your eyes land first.
01:17If you look at the bottom of the picture, your brain probably thinks it's a horse.
01:21But if your gaze goes to the upper right corner first, suddenly it looks like a seal's tail.
01:27But it's not just about where we look.
01:29Then, something even stranger is happening here.
01:33When our brains spot an ambiguous figure with unclear information, we basically see what
01:38we want to see.
01:40In one experiment, scientists showed this exact image to a group of people and told
01:45them that if they spotted a farm animal, they'd win a candy treat.
01:49Yum!
01:50But if they saw a sea creature, they'd get canned beans, which is kinda weird, right?
01:56The results showed that 80% of the people saw a horse.
02:00So they decided to switch it up.
02:02This time, whoever saw a sea animal would get a treat.
02:05When the motivation changed, can you guess what happened?
02:08More participants ended up seeing a seal in the second round.
02:12So yeah, it seems like psychology plays a huge role in how we interpret ambiguous images.
02:21We also have these undecipherable figures.
02:23I mean, no matter how hard you try, you just won't be able to fully understand the image.
02:30Take the impossible trident, for example.
02:32On one side, it looks like three cylindrical shapes.
02:36But on the other side, it seems like they merge into two rectangular parts.
02:40This happens because the vision center of our brains does a lot of its work subconsciously
02:45and automatically, interpreting the figure as a three-dimensional object.
02:51When we see that structure in 3D, it doesn't make any rational sense.
02:55It's similar to the Penrose Triangle.
02:57This triangle is physically impossible to construct in the real world, so we just can't
03:02figure it out.
03:06The next optical illusion is the negative afterimage effect.
03:10So look at the three dots on her nose.
03:12If you didn't guess it already, that's Jennifer Lopez, looking like an Avatar character.
03:17But don't worry, this eerie look is about to change right before your eyes.
03:21Keep your gaze fixed on those three dots right in the center of the picture.
03:25Don't look away, and don't blink.
03:28Alright, on the count of three, we'll switch to a blank white screen.
03:33But you have to keep your eyes wide open.
03:35Ready?
03:36Here we go.
03:371, 2, 3, bam!
03:40Can you see what I see?
03:41Yup, it's J.Lo, looking fabulous in her red outfit.
03:45Crazy right?
03:46But there's a solid reason behind this magic.
03:49Our eyes have millions of tiny light-sensitive cells called rods and cones.
03:55Rods help us see in low light and pick up things in our peripheral view, which can also
03:59be pronounced peripheral view, while cones are all about color, bright lights, and fine
04:04details.
04:05When light hits these cells, they get excited and send signals to our brains, where everything
04:10gets processed into what we actually see.
04:14But here's the catch.
04:15Cone cells can get tired.
04:17If they stare at the same color for too long, well, they need a break.
04:21That's when other cone cells step in to help out.
04:25Different cone cells are better at handling red, green, and blue colors.
04:28So when certain cone cells get fatigued, the theory of opponent processing kicks in, allowing
04:34other cones to take over.
04:36And that's how the color in J.Lo's photo magically appeared.
04:40Hey, look who it is!
04:44Einstein!
04:45Well, squint your eyes, or if you prefer, take a few steps back.
04:49Wait, is Einstein suddenly turning into Marilyn Monroe?
04:53This is a hybrid image, which is kind of like a mash-up of two pictures.
04:58It combines the blurry parts of one image with the sharp details of another.
05:03In this case, Einstein's image is all about thin lines and sharp contours, like wrinkles
05:07and strands of hair, while Marilyn Monroe's is more about the big picture, with those
05:12blurred shapes.
05:14When you step back or squint your eyes, those tiny details fade away, and suddenly, Monroe's
05:19face jumps out at you.
05:22The same thing happens here.
05:24At first, this woman looks kind of, meh, not happy, not sad.
05:28But if you squint your eyes a little, suddenly, she looks really mad.
05:33Uh-oh.
05:34Wow, what a twist!
05:37Here are Kim Kardashian and Timothee Chalamet's photos turned upside down.
05:42Did you notice anything strange about them?
05:45You probably didn't, but if you look closely, you'll see their eyes and mouths aren't
05:50flipped.
05:51This is called the inverted face illusion.
05:53It happens because our brains are wired to recognize faces right-side up.
05:57We process them as a whole and pick up on details really quickly.
06:01But when a face is upside down, our brains struggle to catch those odd details, like
06:07the upside-down features.
06:10This trick is known as the café wall illusion.
06:13And what's crazy about that is these bricks aren't crooked at all.
06:17In fact, the horizontal lines are perfectly straight and parallel.
06:21This image tricks our brains because of how we process contrast.
06:25The sharp black and white tiles next to each other create a visual conflict, making our
06:30brains think those lines are bending.
06:33But if you switch the colors to something softer, like pink and blue, the illusion disappears.
06:39The softer contrast doesn't mess with our perception the same way, so we can see the
06:43straight lines clearly.
06:45And there's something else.
06:47Check out the layers of mortar between the bricks.
06:49Yep, those gray lines.
06:51The distortion only happens when the brightness of the mortar is somewhere between the dark
06:56and light tiles.
06:57So if the mortar is too dark or too light, the illusion fades away.
07:03Poof.
07:05These strawberries are red, right?
07:07Wrong.
07:08In this case, the strawberries aren't red at all.
07:11They are gray.
07:13This magic happens because of something called color constancy, which is our ability to recognize
07:18the color of an object regardless of changes in lighting or surroundings.
07:23In this experiment, all the red pixels in this photo were swapped out for gray ones,
07:28and we can prove it by zooming in.
07:30It only looks like there's red in this picture because the background is blue.
07:34Our brains think that the light source has some blue in it, and then they figure out
07:38the color of things by discounting the color of the light source.
07:42When your brain takes those gray pixels and subtracts out that blue bias, you end up seeing
07:48red.
07:49Interesting, right?
07:50The same thing happens with the dress.
07:53If your brain sees the lighting as a bit yellowish, it tries to discount that golden glow, making
07:58you see the dress as blue and black.
08:01And if your mind thinks the background is darker, it discounts those bluish tones, and
08:06suddenly the dress looks white and gold.
08:09So what's the real color of the dress?
08:11Well, in this case, it's actually black and blue.
08:15But let's wrap this up before we dive into that never-ending debate again.
08:22That's it for today!
08:23So hey, if you pacified your curiosity, then give the video a like and share it with your
08:27friends.
08:28And if you want more, just click on these videos and stay on the Bright Side!
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