The Royal Institution
Why doesn’t magenta appear in the rainbow? The answer lies not in physics but in biology.
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Science presenter Steve Mould demonstrates the strange phenomenon of colour mixing, in which not everything is as it seems. The cone cells within our eyes are responsible for the colours we see, but are only sensitive to Red, Green and Blue light. So how are we able to see so many colours when we can only directly detect three and how do our brains see the colour magenta which doesn’t have a wavelength?
Steve explains all with the help of his coloured torches and explores how everyday technology fools our brains into seeing more.
Find out more about Steve Mould on his nerdy blog http://stevemould.com or @MouldS
More about Magenta: http://ekrelliott.wordpress.com/2009/08/18/on-magenta/
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Purple is the shadow spectrum of grey just like black is to white
OMG What witchcraft is this???
first green now purple ?
Oh, don't be so silly.
who cares how frequent or the way he breaths
.good vid explained well.
cheers
His over confidence explaining this stupid subject is quite annoying
Um I see purple in every rainbow.. I think your eyes might not work buddy
Damn papito
if purple doesn't exist, why are we talking about it??
Curious thought: how does the cones relate to colorblind individuals?
Does this mean that "ultraviolet" is a misnomer? Do human eyes perceive color in light of shorter wavelengths than blue?
Purple and magenta are NOT the same color!
And now you can just realize – your nice modern "warm white" LED bulb is in fact firing three strong peaks of light at your eyes, instead of a nice continuous emission of a plain incandescent bulb. Imagine how that impacts your health long term (not only eyes). And am I the only one to notice that since I started this staring at smartphones thing several years ago (LED backlight of course), my eyesight deteriorates at alarming rate?
Excuse you. Magenta is more of a pink.
Broadly-speaking-purple colors perplexed me for a long time until I saw this: https://midimagic.sgc-hosting.com/huvision.htm. Monochromatic purple light does exist, and it is higher-frequency than blue. The reason why it looks like a mix or red and blue is that our red cones also have a slight sensitivity to those wavelengths!
Your jus blew my fckn mind!
what r those flashlights called
Sorry to say you’ve missed the boat. There are two types of color additive and subtractive. In additive color, which is light, where all primary colors added equally make white, there is no purple. In subtractive color, which is pigment, where all colors added together make black, there is purple. Basic first year color theory.
It's not different than the fact that we do not actually see yellow. It, like purple, is a secondary color that's just shades of the two colors that makes up the color being viewed.
Funny how this is true, and yet… ALSO: Other creatures may have different color receptors, right?
So beauty is fraud in a fraud? Who do I sue? What game and for whom are we playing it? What does the world actually look like? Is that beautiful woman in front of me horrifyingly ugly in the real world I can't see? Now, I'm not gonna trust my nose either. Everything is a lie!
Formal name for purple is "violet".
If purple is a made up color in your brain, is purple individual for every person? I.e does my purple look the same as your purple?
Professor X's little bro is on point
This video is brilliant!
I have wanted to know how this works for the longest time!!
magenta is not purple
if the color spectrum in a circle then purple is between red and blue.
This is dumb. Purple is perceived just like any other color. To say it doesn't exist and our brain makes it up is to deny that our eyes work in the first place. If something is devoid of green, it's purple. Our eyes don't work like a line of colors, but more like a circle connecting at the ends with a redder violet in between. (Another perceivable color) Violet exists in a rainbow, that's what we see as dark purple. Redefining it doesn't change it's original values.
NEVER CROSS THE BEAMS!
Blue + Red = purple/violet
Magenta is just pink
It's simple. When you look at something and it's not blue or red, but something in between, you call it purple. If you don't care about the science behind it, you gotta call it something.
Jeez they had amazing digital title effects in 1993
Dogs don't see color. But they can smell them.
I'm colorblind. Thank you for confirming what I already knew. Purple doesn't exist!
And that's why purple looks so pimpin coz we don't see it often in nature
You can’t mix colors together in the south either
Purple isnt exactly a different colour is it? Its just a shade of blue like if we had a different name for like light ish red. Not a different colour.
I seriously call B.S on this ! This CONE thing is just made it and kinda lame ! Also, White isn't a color ! There's no way that MILLIONS of colors exist and NO they don't all come from blue/red/green !
Yes it does its called purple
Try to imagine perceiving another color
You have the same breathing pattern as Michael Bisping that inhale very deeply after each sentence. I would try the audio a little farther away to see if the breathing sound is reduced. Since your voice is clear and loud you might not need the audio so close.
Magenta is redder than purple
Violet and purple are the same color
Pink is light red
so… wdym Magenta is Purple??
What about your ice cream cones?