On Wed, 08 Mar 2023 11:33:34 -0000, Max Demian <
max_d...@bigfoot.com> wrote:
> On 08/03/2023 06:08, Commander Kinsey wrote:
>> On Tue, 28 Feb 2023 17:28:35 -0000, Max Demian <
max_d...@bigfoot.com>
>> wrote:
>>> On 28/02/2023 15:55, John Larkin wrote:
>>>> On Tue, 28 Feb 2023 13:39:53 +0000, Max Demian
>>>> <
max_d...@bigfoot.com> wrote:
>>>>
>>>>> On 27/02/2023 20:55, NY wrote:
>>>>>> "Commander Kinsey" <
C...@nospam.com> wrote in message
>>>>>> news:op.101j6...@ryzen.home...
>>>>>
>>>>>>> So they couldn't explain the difference in colour of a lettuce and
>>>>>>> the
>>>>>>> sky? WTF?
>>>>>>
>>>>>> Exactly. It's weird that they survived for so long without words to
>>>>>> differentiate colours which most of use see as being different. The
>>>>>> various colours at the blue end of the rainbow (blue, indigo, violet)
>>>>>> are not as easy to differentiate, and I can understand *those* being
>>>>>> thought of as various shades of blue, but red, orange, yellow, green,
>>>>>> blue are all colours that are fairly distinct and deserve
>>>>>> individual names.
>>>>>
>>>>> Who decide what are distinct colours anyway? To my way of thinking,
>>>>> there are six /distinct/ colours in the spectrum, red, orange, yellow,
>>>>> green, blue and violet.
>>>>>
>>>>> Indigo was added by Newton to make it up to seven, which he regarded as
>>>>> a magic number.
>>>>
>>>> Human cone cells come in three wavelengths, roughly r-g-b, so if we
>>>> name more colors it's arbitrary.
>>>
>>>
https://en.wikipedia.org/wiki/Cone_cell
>>>
>>> From the diagram on the right, it's more like blue, greeny-yellow and
>>> yellow if you measure the sensitivities at different frequencies.
>>
>> I call bullshit. If the lowest frequency detector was yellow, how do we
>> see red? And why does the RGB system on TVs work so well?
>
> (a) The frequencies represent the peaks of the curves. You will see from
> the diagram that both of the yellow sensitive cones have tails that
> extend well into the red. We see red by comparing the relative levels of
> the two. People with only one type of yellow cone can't do this, which
> is why they can't tell red from green.
This says it's RGB:
https://www.verywellhealth.com/eye-cones-5088699
This says it's YGV, yet the graph shows the V peaking at a colour which isn't even on the screen:
https://en.wikipedia.org/wiki/Cone_cell
I'm gonna go with the long held belief it's red green and blue.
> (b) I suspect that any three well separated colours would work. Maybe
> RGB was chosen as phosphors and dyes for those colours are available, or
> maybe because "famous scientist" Maxwell said that we see red, blue and
> green.
More likely everyone's eye is different and without actually dismantling your eye we can't tell. It would explain why some people say colours "clash" and others don't. Or maybe that's just women being stupid, a man never says a colour clashes - how could it? They're just different colours. They don't react with each other like chemicals in a test tube!
>>> We can perceive a lot more colours by comparing the relative signals
>>> from the different cones.
>>
>> I wonder why women tend to be more colour fussy? Are they being fussy
>> or accurate?
>>
>>> How we name them is up to us, according to how important they are.
>>>
>>>> Retinas vary a lot between individuals too, especially males.
>>>
>>> Many (mostly male) humans have only two kinds of cones: blue and yellow,
>>> which is what most mammals have.
>>
>> It's nowhere near "many".
>
> My other post links to the Wiki article on colour blindness. It's about 8%
Not here, maybe varies per country.
>>> Males with just the two kinds of cones (referred to a red/green
>>> colour-blind) can see about three distinct colours in the spectrum
>>> instead of six.
>>
>> Females sometimes have 4.
>
> Showoffs.
Except if you ask them to show off their tits, they won't take it as a compliment. Have you ever known a guy say "how dare you want to see my penis!"?