Re: [Phys-L] Sliding Door Sliders as Optical Filters?
rayleigh scattering. my 2 cents. interested in hearing others' answers
On Wed, Aug 30, 2023, 11:21 a.m. dgpolvani--- via Phys-l <
phys-l@mail.phys-l.org> wrote:
> We recently moved into a retirement apartment which has a balcony sliding
> door with slider (vertical) blinds. We have a northwest view out the
> sliding glass door. The apartment is on the sixth floor. In the
> afternoon,
> when the sun is in the west, if we close the sliders, they appear reddish
> as
> they rotate about a vertical axis due to AC air currents. Normally, the
> plastic sliders are translucent and off-white in color. My wife and I are
> curious about what causes the reddish effect. My best guess is that they
> are acting as selective optical filters as they rotate in the sunlight.
> They selectively pass more red light and less blue light as they rotate.
>
> Any opinions on what is causing this effect?
>
> Don Polvani
> Retired Adjunct Physics Lecturer
>
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