Neil deGrasse Tyson Explains How We See Colors

[@spicysaucysweet]

Hencefore the blueberry will now be dubbed "The absence of blue light berries".

[@MrBonners]

Nope, just indicates no blueberries.

[@ARandomInternetUser08]

Why did that sound like a quote from Palpatine, but with a couple words changed? xD

[@spicysaucysweet]

@@ARandomInternetUser08 That's so awesome! I love Star Wars!

[@JohnSmith-ol9yv]

that's not necessary, since blue is defined by the pattern of wavelengths that reaches the eye... it's the same whether you describe which of the wavelengths are absent or which are present.

[@spicysaucysweet]

@@JohnSmith-ol9yv it's a joke....have a laugh!

[@mikethompson7132]

ITS WAY MORE THAN I CAN COVER IN THIS SHORT VIDEO?????......MAKE A LONG ONE THEN NEIL !!!! YOU KNOW WE LOVE EVERY MINUTE OF THESE !! :)

[@HaydenTheEeeeeeeeevilEukaryote]

this video felt like 5 minutes

[@eringerych6616]

I would like it to be as long as it needs to be

[@newgrowth74]

Chuck looks like he smoked a heavy Sativa before the show 😂 Love these 2 🧠 🧠

[@chandlercallaway9551]

I believe you are right lol

[@gwndocter8096]

Smoke one for chuck

[@sabieleclipse5799]

Doesn't he always? Makes it easier to brain up 😹

[@kyusshead]

He's totally blasted! The apple part!

[@savagepug]

He's pretty cooked on this one lol

[@whatdamath]

I admire Neil's ability to communicate concepts, but I also love exploring ideas from deeper perspectives. In this case I really wanted to address a few misconceptions that might arise from his explanation. When he talks about color (e.g. apple, dress) - the concept is very subjective and is entirely made inside every one of our brains. It has no “physical reality”. This is very different from the scientific concept of spectrum that he is trying to convey which refers to the frequency of light spectrum. The dress color and the idea of apple being red are all perceptions formed inside our primary visual cortex and are interpreted entirely differently by each and every human being on Earth. People that are color blind will obviously perceive said apple or dress differently, as will people from entirely different cultures to your own. There are countless psychological experiments that show that for example growing up in an Amazonian tribe vs a cosmopolitan city will result in an entirely different primary cortex that’s able to interpret shades of green that a city dweller cannot see. At the same time, the color constancy (relevant psychological concept) means that we also tend to use secondary cortices in our brain to create a kind of a bias toward seeing certain things certain way. Meaning that even under a different light our brains may interpret the apple as red, even though no actual “spectrum” is sent into the eye. All of these color concepts are difficult to explain without taking the study of perception into consideration, so I find it’s best to explain things one at a time because this is a lot more complex than “white and black” for the lack of better pun.

[@abhishekconstantinewinches9907]

Every colour has been identified universally same. That's why we all always talk about our favorite and disliked colours.

[@dbutcher84]

He acknowledged that people see colors differently and that it's an individual perception. He said "I don't care what your rods and cones are doing" and wanted to focus scientifically on how color comes to our eyes, but yes, it would be very interesting to have him go into how we actually perceive color, as I am quite colorblind myself. I also wish the other guy could actually keep up with simple concepts.

[@skychief80]

Still 99% of people agree that the sky is blue and the grass is green. And so with countless other things.

[@dbutcher84]

@@skychief80 you mean 95% or so😉. Most if not all color blind people only know for sure that the sky is blue and such things from being told so. The rest still see color in slight variations, but close enough that it rarely makes a difference👍

[@PaFREd0]

Hellooo Wonderfull Personnn :D

[@StreetWorkout]

It's hilarious when after "No way!" and "Just say it!" he said "rainbow" instead of "black" XD

[@SkyyVega]

Ooof I felt Neil’s frustration when he was trying to not tell him it would be black. I was literally yelling IT WILL BE BLACK 😹😹😹

[@spicysaucysweet]

Thinking in reverse is hard! Lol

[@spicysaucysweet]

Thinking in reverse is hard! Lol

[@cmkmusicislife1571]

Same lol

[@temujinemorgan]

Yes the strangulation gesture was how I felt. Chuck is normally faster than that.

[@erickm119]

Me too, I was screaming at my monitor. Chuck, its black, BlAcK, BLACK, BLAAAAAAAAAAAAAAAAAAAAAAACK!

[@TheGuruMeditation]

This is brilliant. As a director of photography I deal with color every day. A lot of this comes into play especially when I am using color filters in front of the lens. Also understanding why a red filter makes a blue sky dark on black and white film and why a green filter makes foliage light. Awesome episode guys!

[@TheWorld_2099]

Hey, I am highly interested in the subject of filters and photography, where would you suggest I read up (or take a video course) on this?

[@johnnymann14]

This is the reason i love science

[@subject8776]

Because science just is, it's fact, it doesn't care about feelings of anyone and that makes it so pure.

[@sockfreak2003]

@@subject8776true but science is an abstraction of our senses, through experimentation, so it isn’t the true reality but it’s a good indicator of what reality could be.

[@sacredgeometry8275]

My fellow art teacher and I are doing a webcast about the Elements of Art as live online lessons for our students. This week is about color and your video just helps confirm to the kids that their teachers know what they're talking about when it comes to this subject. We've put your video on our Deep Dive for the unit. Thanks for being so awesome and we'd love to see more color videos!

[@b1nqyr15]

Last week you tell me what we call North and South magnetic poles are actually the opposite of what we call them, and now this week you tell me every coloured object I see is actually everything except that colour!!! My mind is blown. Thanks for everything you do.

[@stk1975]

I loved this episode I did not only learn but I laughed so hard.

[@FreeRiderFMX]

Right from the opening joke hahaha

[@Ian-uu3dz]

Monkey Brothers UNITE!

[@JaymesSinnah]

Chuck i dont find very funny but he nailed it here!

[@Modernday13579]

Color police 🤣

[@davidblack2035]

I actually laughed this episode too

[@InsaneMetalSoldier]

I'm sure I'm now the only one that yelled at Chuck: "SAY BLACK FOR GOD'S SAKE! BLAAAAAAAAAAAAAAACKKKK!!"

[@tenoki]

I did too Fam! I did too!

[@Larstig81]

Same here 😀

[@thenbwkmtkspktrminc.4613]

Great point ✌🏿😁 #blackspectrum✴️

[@Laser9113]

This was definitely one of the funniest explainers

[@MarySmith-nv4ni]

These guys are funny!!!!

[@angel24eyez]

The +100 dislikes are from colorblind people. Thank you StarTalk and Dr. Tyson for yet another amazing video. We need such educational videos more than ever considering how thru online courses teachers are not as interactive as they used to be in a real classroom. Keep it up! 👏🏻

[@createlovehappy]

You two are so entertaining that you make this science stuff even more exciting to learn. Thank you so much for educating us in this way.

[@aritzendollar]

🤣 "An object isn't really it's color." I kept thinking, "There is no spoon." 😂

[@XanderEwald]

There is a spoon. The spoon is just not the spoon‘s color.

[@thenbwkmtkspktrminc.4613]

The prism's use wavelengths as identifiers to measure its wavelengths. But don't quote me on that 🎓 #blackprism♠️

[@carultch]

@@thenbwkmtkspktrminc.4613 Frequency defines color. Not wavelength. Wavelength varies when light enters optically dense media, and therefore changes speeds. Same is true for waves in general when changing speeds. Wavelength changes when speed changes, while frequency remains constant and defines the information carried by the wave. 700 nanometer Red light decreases in wavelength by 25% when it transitions from air to water, but it doesn't become green just because it is now 525 nanometers. Its frequency remains 430THz, and it remains red light. However, there is a limit as to how high we can measure frequency directly. This is why radio waves are identified by frequency, but visible light colors, UV light, and X-rays are commonly identified by wavelength. Measuring wavelength is used as a proxy to measure frequency. We mean vacuum wavelength if we don't otherwise specify the medium of EM waves.

[@jigartalaviya2340]

@@carultch Holy shit.I never thought abt freq and wavelengh this way. For all the toxicity in all the comment sections...sometimes u find this kind of gem. Thx.

[@scottgrohs5940]

I just took it as evidence that our eyes lie to our brains.

[@olivialakyn]

I had a heated discussion with some old pals a few years back about this exact subject. Got extremely intense.... BUT I know now that I was totally right, so thank you for this! ☺️

[@jasons7044]

No you didn't🧐

[@ARandomInternetUser08]

@@jasons7044 I bet he was, if it obviously was proven right objectively.

[@thenbwkmtkspktrminc.4613]

Our Ancestry not Greeks taught this science but white Greeks like Soo Soo many studies gets aLL of the credit, in Our society 👀 🌍

[@bushwick5313]

People definitely looked at me weird when I was yelling "IT'S BLACK! At my phone with headphones on 😂😂

[@ThumperSpinnerbaits]

Your mention of "dark adapt" reminded me of my time as an aircrewman in the Marine Corps. When we would have "unaided" night flights ( no NVG), we would wear have to wear red colored glasses for a few hours before the flight. And all the instruments in the cockpit had red lights turned on. However, when we flew NVG missions, the cockpit lights were changed to blue.

[@bojnebojnebojne]

it's pretty easy to understand this concept as the light our eyes are seeing is the colors that are reflected and not absorbed by any given object

[@amjadmohmood6391]

I always feel a bit down when I open a starktalk video and the co-host is not Chuck Nice. This isn't one of those

[@wizardsuth]

Does the MCU have a video series called StarkTalk? That would be funny.

[@ApexHerbivore]

Colour is just a pigment of your imagination.

[@DrpToast8]

I think its spelt like "Color"..... Well I'm American

[@some_haqr]

@@DrpToast8 yeah it's spelt colour.. Americans must be so lazy they have to drop letters from words or just pronounce them wrong

[@jihadel-amin]

😆

[@bikkies]

I see what you did there. No wait, I saw the absence of what you did ... No, erm, I saw what you didn't... I think the Matrix has me but I don't know if the red pill is red...

[@G4MMABA3]

YOU BETTER STAAAWWP 🤣🤣🤣🤣🤣🤣🤣 💀💀💀💀💀💀yours truly, a visual artist lol

[@2112slee]

Dr. Neil “okay, now watch” Tyson

[@josephhayes6071]

As a tritanopia colorblind man - this amused me greatly. I identify by tone - and those RGB numbers are like braille for us folks. Thanks Neil - and that intro music is dope

[@buzzottafromhull]

Just watched this and loved it. ""Resonance" is the key word. A guitar works from the resonance of the string length while tapped or struck (impules) producing a Frequency tone. When you tap (impulse) any objector it will produce a sound or tone. Light is the impules and on any object it touches will produce it's Resonance Color. It all about "Frequencies".

[@AniruddhaRoyChowdhury3001]

We need more languages in captions. This kind of scientific knowledge needs to be spread into all cultures, all people of all colours.

[@QQuantum]

Absolutely agree with you my friend. I can do it into spanish

[@jeffwells1255]

Wait until the p/c weenies get hold of this: they'll scream that talking about blackness is a form of "cultural appropriation" and make up a "neutral" word to describe it.

[@AnuvabGhosh-sx5eu]

Then also people are scientific illeterate 😂😂😂😂

[@ahmedbenmaiza1250]

"Keep looking up !! ... " 🖤🤍 Best duo ever !

[@nazsuka3249]

Last time i was this early einstein was explaining his theory

[@5777Whatup]

Last time you were this early...she was very disappointed and you made another baby mama.

[@Zackaria_sMax]

@@5777Whatup HA!

[@seapot9675]

Nice kira prof pic

[@thinkingahead6750]

I loved the enjoyment you seemed to have making this. It cheered me up. Many thanks.

[@bangkok_as_is]

the red apple explanation blew me away... i'd never thought of it that way. makes so much sense. thanks a lot 👍🏻

[@longgalans]

Chuck's teeth is brighter than my future lol

[@spicysaucysweet]

Or the absence of black ...he has black teeth lol

[@allmightjunior6917]

his teeth reject all colors

[@bootydoc]

😭😂😂😂😂

[@MrChileLimon]

Thats a pretty high bar though. A hidden self-compliment perhaps?

[@shaan702]

All Might Junior reflect*

[@ZeniferJenZ]

They're back..... ✨

[@hamiltonshamilton9871]

The baby is at sleep and I’m just here enjoying my cup of Lipton tea while watching these two talking about colours lol best evening ever!!!

[@seanlyman4049]

This feels like my daily experience teaching physics. I feel Neil.

[@adarshpathak4664]

Already Raised Hands🤚wanting More Episodes on Mysterious behaviour Of Colors 💯

[@sscomedy4492]

My brain just exploded. I absolutely love you Neil deGrasse Tyson and Chuck. You couldn't have found a better match with you two. With Neil deGrasse Tyson being so smart and teaching you the way he does and then you have Chuck on the other hand giving you the comedic relief absolutely love it you guys are the best thank you for what you do.

[@jgonzalof]

Chuck sucks. He is not funny at all

[@BlxckJesvs]

The “I don’t see color” opening was GOLD, especially for the climate that America is in currently.

[@TheManWhoTypes]

Yeah...

[@insane_troll]

So the color is gold? What does that have to do with the climate?

[@BlxckJesvs]

Insane Troll I’m sorry you dont understand what I said

[@ryanx9372]

@@insane_troll shut the eff up and troll elsewhere, like 162u.37794.yt

[@thomasjohnson6808]

For not seeing color he brings it up in every episode. It is quite tiresome and not at all creative or funny.

[@AnhTrieu90]

Next time I wear black, I’ll refer to myself as the most colorful person in the room.

[@aaronseet2738]

Aha, but are you reflecting radio??

[@thenbwkmtkspktrminc.4613]

Neil didn't explain transparency the way Our Ancestry did TEACH the world. But hes a (?) Scientific explanation 👀

[@AnhTrieu90]

@Aaron Seet I’ll put some tin foil underneath. That’ll cover radio and infrared.

[@sandis550]

If you wear black aren’t you the “most colorless person on the room” since black is the absence of color of light?

[@taishibikiqe8796]

@@sandis550 Well he's absorbing all the colors

[@tarunbiruly5379]

While procrastinating I always thought about this logic and now I am glad that Dr.Tyson talked about this topic.

[@makabuca]

I can't stop watching you guys, please don't stop making this videos!!

[@viralmath]

Poor Chuck on this one 😂😂😂

[@nathanjasper512]

Yeah he's normally a pretty sharp guy but he was having a tough time today.

[@sanveersookdawe]

@@nathanjasper512 he had to make his eyes red specially for this episode

[@vansdan.]

"don't even say it's gonna be rainbow" i died laughing

[@tonycmac]

More color episodes please! This is enlightening. See what I did there?

[@tuhaggis]

Yeah I'm on your wavelength

[@Orion225]

Yeah they should do videos like this more frequently.

[@rileyvinsonii7620]

Neil that was funny. Off the hook funny. Me being white and color blind I thought it might I lighten me. But the two of you had me in stitches. Love your show. Riley

[@paint3dwight]

As an art teacher, this is my favorite science subject and I love teaching color theory... plus, I had a student during a lecture who had a life changing moment when he realized he wasn't "white" and the people his parents weren't fond of weren't "black." Science and art; changing minds one person at a time.

[@treetopjones737]

Then get into what causes the differences, and also history of Earth and he can realize how ignorant his parents are.

[@marcosfigueiredo4885]

10:00 was the moment where Neill really reviews his place as an educator in this world: "Farming is nice, why I'm here and not in a farm?"

[@sergiozdrums]

I love this show ! you learn something new and interesting while having a laugh!

[@paradoxpax8357]

Chak is high AF LOL

[@patricknelson]

9:40 - Chuck’s mind is absolutely 💥

[@theduder2617]

This is a favorite explainer to revisit.

[@adarshpathak4664]

I Love Watching...Learning From You Guys love From India🇮🇳🙏

[@alexzandermorgan9356]

I love these guys, I’m so glad they are still making short shows during this “pandemic”. I love being able to learn and laugh at the same time. I get giddy when KZbin notifications direct me to a new episode.

[@andremorning7427]

We want five more color episodes 🤗

[@ourunstablemind]

Chuck has such bright white teeth. He needs to be in a toothpaste commercial, if not already.🙏👍 Regards Joy

[@UzairJSherwani]

Awesome!! Need more Eps on COLORS definitely!!!

[@DrumsTheWord]

I would have thought that you would have seen gaps in the red can where the text was, but that it would be black...no colour? Unless the red can is red under the white...but then how is the red light going through the text to reflect back from the red can underneath? Does that make sense? Great video!!

[@FOWBOWZ]

I love this episode , I hysterically laughed and learned a perspective I've never even thought of.

[@garidavid]

Saludos soy de Ecuador, me encantaría que los videos vengan con subtitulos español. Seria fenomenal.

[@carultch]

To translate for you, in hopes the channel owner is reading: "Greetings, I'm from Ecuador. I would love it if the videos came with Spanish subtitles. It would be phenomenal."

[@acimand]

Funniest episode ever. And Chuck is a great foil, because he is expressing the difficulty we all have with the concept. We all know white light contains all the colors, and we all know surfaces absorb all colors except the ones they reflect, but to use those two data points is still a leap of logic that's tasking.

[@rmeaso]

As a physics teacher, who is covering this topic right now, I would love to use this in my classes, but the auto-captions that it currently has do not meet ADA standards for my Deaf and Hard of Hearing students. KZbin makes it pretty easy to go through and edit the captions for grammar and accuracy (ie adding punctuation and correcting any words that did not transcribe properly).

[@mallowthecloud]

So... people like me who "saw" the dress as white and gold were assuming something about the photo (that turned out to not be true) and our minds adjusted for it. Specifically, in this case, we saw the dress in a context of a photo awash with blue light, or not correctly color balanced, with too many blues. My point is that you can say "I care what color it actually is", but that's way oversimplified. If I took a picture of a white dress, and the picture was taken in blue lighting or not properly color balanced, and there was enough context in the photo to make that obvious to a human observer, then a computer might say "this dress is blue" based on the color of the pixels, but a human would rightly say "this dress is white" based on the other context clues. It's not always as simple as "measure the pixels" if there's a bias in the measurement!

[@lucasd.garces435]

0:11 that was the same joke that I thought 😂

[@mgszelda1]

Right

[@Katanaz]

Left

[@marknolastname441]

What a hilarious and insightful conversation. Cracked me up, and I learned.

[@dat_boiijosh4828]

Neil: *Touches his laptop in replace of other dudes Knee when he laughs*

[@epicon6]

So true :) he is also an arm grabber if it's closer than a knee :)

[@dineshms7667]

Your communication of science makes the information go straight into my head. Thank you Dr. Tyson, and Mr. Chuck, your humour makes me laugh hard.

[@jude_foster280]

Can I just say that this comment section is the most interesting and intellectual I’ve ever seen . There’s full thrown debates about wheather light is a physical inherent property or if it’s a process in our brains that perceives it as real . Amazing

[@wizardsuth]

The same word is being used for two different things -- the wavelengths of light and our perception of them. If you see a mix of red and green light, you perceive it as yellow, and in fact that's how computer monitors generate yellow. But none of the light you're seeing is from the yellow part of the spectrum.

[@vb2388]

Can you please make a StarTalk video on the recent discovery of possible Life on Venus?

[@spicysaucysweet]

They already did! Look in the video catalogue I just watched it today

[@vb2388]

Cyn OG...where? Send link pls..

[@spicysaucysweet]

@@vb2388 www.startalkradio.net/show/cosmic-queries-life-on-venus/

[@spicysaucysweet]

@@vb2388 sorry I realized I listened to the podcast instead of watching. I do both lol! Enjoy! (PHOSPHENE is the word of the day!)

[@c.james1]

@@spicysaucysweet *Phosphine.

[@jGRite]

THAT IS DEEP. From: "The apple is red" to "the apple rejected red". that changes a lot of things.

[@pier-lucgaranddion1527]

I understood that point, but found it pretty moot. Because following that idea, what we call "being red" simply changes meaning to "reflecting the precise wavelength we identify as red". We do weirder things that we all commonly accept in language anyway! (Contradictions in idioms, descriptions, expressions, etc.)

[@aldeharp]

The dress colour is about context of what you perceive the light source to be.

[@FM-oc2yv]

We waaaaaaant more episodes about colors! This was not enough at alllll…and thank you!

[@googlejse]

i love how this video has high contrast on light and dark shades

[@moeg8220]

Sending Dr. Tyson some love from Jeddah ❣️

[@christianmckee3614]

I’m early! Hey Neil, I love your videos!

[@steve-o6413]

I remember that from grade school, see Mom I was paying attention even though my grades didn't reflect that...

[@thomaslane1547]

That's because your grades were *absorbing* all the A's.

[@gridhop]

🔍

[@me.arbaazkhatib]

Yess please!!!! More episodes on colors!

[@mossyastronaut]

I love your videos!! I would enjoy to see more technical episodes! DON’T HOLD BACK NEIL!

[@rickhunter7]

And now my wife is wondering why I'm yelling "black!" to the phone.

[@pery0012]

Imagine what my mom could see in her mind: she's daltonic. So the apple never was really Red or the Absence of Red...because she lacks the center of the macula on both eyes. She lives in a parallel universe :). That's how cool she is ;)

[@deathstroke8639]

That is pretty cool

[@MusicInMyJeans]

Do you mean colorblind?

[@pery0012]

@@MusicInMyJeans Yes, she has daltonism (or colorblind). Fun fact: is usually a male's problem by statistics, so she is also rare.

[@MusicInMyJeans]

@@pery0012 Although I wouldn't want it, the statistic side of it is pretty cool. Thanks for the edu :)

[@BakaBroadcast]

Who else was willing Chuck on so hard lol? "You can do it Chuck!" :D

[@drichfanoum6746]

Ure the reason why im loving science. Thank for making science entertaining and less intimidating

[@briangale404]

I can't stop watching these

[@modmaster5152]

when your colorblind and still attempting to understand this video

[@combatx3373]

What about the blind people.. Pure sadness

[@bianca3344]

How do u figure out if ure colorblind?

[@gildedbear5355]

@@bianca3344 several ways. To purposely determine if you're colorblind you would want to take tests which have you look at images made of dots of different colors. They will appear to contain different things (usually letters or numbers) depending on if you're colorblind or not. I'm not sure what type of doctor would perform such a test so the best place to start would be some sort of primary care person. More generally the first clue that people have that they might be color blind is that other people can distinguish between specific colors while the color blind person can't. It's worth noting that MANY people only discover that they are color blind later in life since for them it's normal.

[@modmaster5152]

@Brianca Antunes there are color blind tests all over the internet. The only I use and like is the Encroma color test. It’s online and tells you a lot of info

[@persephonesdad5792]

@@bianca3344 in most cases someone would suspect you were colorblind and tell you. I once read that the most common color blindness is *blue/black color blindness and is found mostly in men. *Hard to distinguish between blue and black

[@gyozakeynsianism]

NDT: "The apple will be black." CN: " ... " Hilarious.

[@patricknelson]

Insert Windows startup sound. I think he crashed his brain!

[@marianfrances4959]

"...i don't care if you are on lsd..." LOL!!😉🇨🇦

[@williangomes5607]

Só

[@SavageDarknessGames]

He knew I’d be watching...

[@MustObeyTheRules]

Too bad I’m on dmt!

[@jonathanjoseph350]

Hahahha

[@juliannryan5542]

Reminds me of how I used to photocopy a print that did not register. I would use a yellow transparency between the paper and the photocopy plate. Worked every time.

[@Wilfoe]

My Dad is a professional lighting designer. He knows a lot about light and has access to a lot of lights. Sometimes he imparts his knowledge on me and my sister. I think this was last year, but I'm not sure. He mentioned the same thing about objects appearing black if the color they reflect isn't present and he had an experimental light he had been given for testing that we could use to test this claim. We used a rose instead of an apple, but he was able to make the flower appear completely black! It was a fascinating experiment! Something I've been wondering for years that I haven't found any info on is WHY objects absorb specific colors. What property about the object affects which wavelengths of light it absorbs?

[@ShiftingDrifter]

Actually, I think the apple would be something "near black" as in the grey scale, because no apple is precisely red. Imperfections of shades in the grey scale will still reflect.

[@bboysaolee]

Chuck is hilarious as always. I am really glad to see you guys still doing the StarTalk. I remember starting listening to the podcast back on Soundcloud :) And Neil, get some rest! You look a bit tired here. But always with great content, positive spirit and humor. Keep it up guys. People really appreciate you! :)

[@JesusMendoza-fy6xf]

I swear 3 seconds ago I was literally watching vsauce talking about light speed

[@niftylittlename]

@J G vsauce posted a video 1 month ago what you talking about?

[@InnerLuminosity]

We are light

[@paulm5443]

what I found even more amazing is how nature gave us a brain that could perceive/measure the different light frequencies. The fact that colour only exists in our minds as a way of detecting these differences. It's thought that we had not evolved to see blue light up until around 6000 years ago. How fantastic is nature.

[@iii-x-iii]

Just shared this to my fellow ophthalmic technicians new to our field in our practice. This will give them a perspective of light and how we process colors in our vision. I'm also hoping this will help them understand our patients' description of their vision due to their retina diseases that affects photoreceptor cells.

[@srijeethj3616]

My mind: If the apple absorbs all the color except red It is colourless...lol

[@ishe728]

I see what you did there. It is one color less lol

[@chaostemporary517]

So this is how we know colors we cant see exist.

[@SSJ21Talon]

What's really cool is that we DO see a color that DOESN'T exist on the light spectrum. Purple

[@richardolson9732]

Isn’t purple just a mixture of the red and blue light of the spectrum?

[@chaostemporary517]

@@SSJ21Talon that is really cool

[@chaostemporary517]

@@richardolson9732 you would think so but sometimes the obvious answer turns out wrong at times.

[@SSJ21Talon]

@@richardolson9732 Exactly, there's no purple light. You can only look at red and blue at the same time and your brain has to make sense of it. If you bend the visible light spectrum in to circle like we do with pigment it starts at Red and ends just past Blue on Violet, so the gradient that would fill in from Violet back to Red is all "imaginary". There's videos that explain it better than that. Purple is simply a color that can't be expressed as a single point on the visible light spectrum.

[@GarrellWoods]

I’m telling you, my guy is high 😂 I was screaming at the screen “Black! Blaaaack! The apple is blaaaack!” I love their chemistry! They are hilarious!

[@dudeusrandomus]

The apple will be a slightly tinted GREY (the tint will depend, again, on the lightsource which ideally should be cyan), because even though it's called a red apple, it still reflects some of the non-red wavelengths. To make it look black it should absorb 100% non-red wavelengths (which we perceive as cyan when combined) , which normal apples don't fully do.

[@JuancitoAKD]

More color episodes !! Pleasee

[@rodneytheredmage3436]

"Do not try and bend the spoon, that's impossible. Instead, only try to realize the truth...there is no spoon. Then you'll see that it is not the spoon that bends, it is only yourself." ―Spoon Boy to Neo

[@andreipastushuk3234]

I can't believe how a man can possibly be that incapable to comprehend and think!

[@robfilms6264]

Amazing episode. I want the rest!!

[@blueowlz]

You shed some light on the topic, thx!

[@tapdance6767]

His attempt to understand by asking Mr. Neil questions really helped me learn the subject matter. I enjoy this type of education. Of course it goes without saying we have an excellent instructor.