Date: Tue, 11 Oct 2005 15:42:02 -0700

Author: Steve Anderson

Subject: Re: Pets, and colored light

Post:

Jerry,

Thanks, yes, the purple anodizing seems to absorb (resonantly) its color
table complement (532 nm) green.
That the reflection of green off purple measures less than the exact same
(incident power, angle and surface finish) reflection off an anodized black
surface means..? . Surface finish may have
more an effect on reflectivity than a filter coating (anodization layer).

I guess the point was trying to make, is that there can be subtraction as
well as addition going on, and it happens beyond just our perceptions of
color (ie my spectrum analyzer says it's yellow, even though it is just red
& green).

Now, am into nano-particles and quantum dots, why is cabernet such a rich
red? Could that effect be used to make giant H-alpha filters?

steve anderson, ETIII
SSU Physics & Astronomy Dept.

(ps I did an experiment and my kitty chases white light specks just as well
as red laser dots (being careful to do it from behind, so she doesn't get
zapped))
From simcha@post.tau.ac.il Tue Oct 11 18:53:46 2005