Re: [Phys-L] Sliding Door Sliders as Optical Filters?
> On Sep 5, 2023, at 06:32, John Denker via Phys-l <phys-l@mail.phys-l.org>
> wrote:
>
>
> 3) Beware that the human eye is not a photometer. Reeeeally not.
Right, I discovered that when I foto’d the sky to show the rotation of the
stars when I was in Kenya, walking distance from the equator. The stars varied
in non-white.
Re colour constance: very obvious when one has a lamp with white and orange
LEDs. One can’t “tell” which after a few mins.
bc …. wonders if molecular concentrations still important in sun scatter.
Thinks was Gamow who posited this.
> You
> perception of a "white" thing in a scene depends not only on that
> thing but also other things. Try googling for
> perception discounting the illuminant
> which will lead you to things like this: