On Wed, 27 Apr 2016 19:32:21 +0100, wrote:

On Tuesday, 26 April 2016 18:27:43 UTC+1, Mr Macaw wrote:

No it's not all women, just some. And I don't see how four cones helps anyway. What's the point in having one inbetween two others? You can sense any colour between those two receptors by the brain analysing the strength of the signal from each receptor.

One can also see violet which is outside of the blue receptor peak. Blue light activates the blue receptor and to some extent the green one, violet only activates the blue one and the brain interprets it as violet.

It's quite difficult to see violet.

Have you ever noticed that some bulbs flicker out of the corner of your eye but not when you look directly at them.

All LED car tail-lights flicker out of the corner of your eye, and half of them when you're looking straight at them. Hard to believe in the 21st century we get such ****ty lights (and on decent cars).

it makes them more noticable.

That's the problem. It's a distraction. What's the point in your attention being drawn to every single car?

--
"Quantititty" - noun. A measurement of the diameter of a woman's breast.