so for the orange paper, there are two possible scenarios either the paper absorbs only blue light, so the orange is the complementary, and the paper is actually reflecting all wavelenghts minus the blue band. OR , the paper absorbs all wavelenghts except a narrow orange band, which is also possible if you have a very complex mixture of dyes, or if a molecule has a very complicated absorption spectrum in which it basicly absorbs everything except a narrow orange band. things aren't always what they seem.
so without actually knowing what your material is made of, it's very tricky to say what wavelenghts it's actually transmitting if i showed you a yellow object , it's impossible for you to say it actually transmits yellow wavelenghts because it absorbs everything else, OR it simply absorbs a narrow violet band, making it appear orange, unless you have a spectroscope, you pretty much have to guess
Strange how the color wheel is literally just the ends the visible spectrum stitched together. You’d think there wouldn’t be a smooth transition, but I guess there is. Complimentary colors are always four “blocks” apart if you choose to loop around on the spectrum.
So I would like to ask why we see a transition metal violet when it absorbs yellow light. Why not we see it red for example or green or any other colour different from yellow but specifically violet.
Actually this painter colour wheel will give you the wrong results. Really what you have to think about is your three kind of cone cells which (simply put) detect red, green and blue wavelengths (not red, yellow and blue). The opposite colours will be perceived for the substances absorbing red green and blue wavelengths, which are cyan magenta and yellow respectively, not coincidentally the colours of printer ink (which creates all kinds of colours by combining these three absorbances). So for increasing frequencies of absorbed light you will go to cyan ('anti-red') to blueish to magenta ('anti-green') to reddish to yellow (anti-blue). There's no green in this but plants achieve their fine green looks anyway by both absorbing low and high frequencies in the visible spectrum.
complementary colors are a fascinating subject, but when a substance absorbs a wide range, or has several bands of absorption, things start to get a bit tricky, some substances only absorb one narrow band or color, so it's easy to guess their transmitted color by thinking of the complementary but clorophyll for example absorbs both blue and red, so only green gets transmitted mostly, or we could think of the two complementaries of red and blue, green and orange, and green and orange mixed together would actaully produce a yellow, not green.
Khan academy always seems to go on a random tangent about an insignificant part of a topic. Not a fan of Khan academy and they have never helped me in the slightest, but they have a way of staying consistent at that.
![PURPEECH - นี่ฉันเองคนที่... (It's me) [Official MV]](http://i.ytimg.com/vi/NuhHd0hOOg8/mqdefault.jpg)
so for the orange paper, there are two possible scenarios
either the paper absorbs only blue light, so the orange is the complementary, and the paper is actually reflecting all wavelenghts minus the blue band.
OR , the paper absorbs all wavelenghts except a narrow orange band, which is also possible if you have a very complex mixture of dyes, or if a molecule has a very complicated absorption spectrum in which it basicly absorbs everything except a narrow orange band.
things aren't always what they seem.
so without actually knowing what your material is made of, it's very tricky to say what wavelenghts it's actually transmitting
if i showed you a yellow object , it's impossible for you to say it actually transmits yellow wavelenghts because it absorbs everything else, OR it simply absorbs a narrow violet band, making it appear orange, unless you have a spectroscope, you pretty much have to guess
damn KHAN ACADEMY turn up your fucking volume
Strange how the color wheel is literally just the ends the visible spectrum stitched together. You’d think there wouldn’t be a smooth transition, but I guess there is. Complimentary colors are always four “blocks” apart if you choose to loop around on the spectrum.
good video. please what is the effect of Ph on Uv absorption curve?
Perfect! Thanks for the class.
Your videos are really awesome~I love them!
Thank you so much 👑
So I would like to ask why we see a transition metal violet when it absorbs yellow light. Why not we see it red for example or green or any other colour different from yellow but specifically violet.
Hüseyin Akyıl Recheck the color wheel it is it’s complementary color
Good
I love this this is so awesome.
But you are so easy for me i.
Need something harder then you because i Learned everything you’re doing last year.
❤️❤️❤️❤️❤️❤️❤️
I thought complimentary for blue is yellow....
For purple its yellow
Wow...!!
Actually this painter colour wheel will give you the wrong results.
Really what you have to think about is your three kind of cone cells which (simply put) detect red, green and blue wavelengths (not red, yellow and blue). The opposite colours will be perceived for the substances absorbing red green and blue wavelengths, which are cyan magenta and yellow respectively, not coincidentally the colours of printer ink (which creates all kinds of colours by combining these three absorbances). So for increasing frequencies of absorbed light you will go to cyan ('anti-red') to blueish to magenta ('anti-green') to reddish to yellow (anti-blue). There's no green in this but plants achieve their fine green looks anyway by both absorbing low and high frequencies in the visible spectrum.
complementary colors are a fascinating subject, but when a substance absorbs a wide range, or has several bands of absorption, things start to get a bit tricky, some substances only absorb one narrow band or color, so it's easy to guess their transmitted color by thinking of the complementary
but clorophyll for example absorbs both blue and red, so only green gets transmitted mostly, or we could think of the two complementaries of red and blue, green and orange, and green and orange mixed together would actaully produce a yellow, not green.
Khan academy always seems to go on a random tangent about an insignificant part of a topic. Not a fan of Khan academy and they have never helped me in the slightest, but they have a way of staying consistent at that.