Re: a link to some interesting illusions

[Robert Cohen <Robert.Cohen@PO-BOX.ESU.EDU>]

Thank you for the responses.  I did indeed get confused by
the statement "blue, cyan, green, yellow and magenta are
NOT seen in the rainbow" because, for some reason, I only
saw the answer, not the question.

I still have a question about "yellow is a mixture of
green and red light".  I agree that the perception
of yellow CAN BE a mixture of green and red light but
couldn't yellow also be "just yellow" (i.e., a single
frequency that excites the red/green cones in just
the right way for us to perceive yellow)?

____________________________________________
Robert Cohen; rcohen@po-box.esu.edu; 570-422-3428; http://www.esu.edu/~bbq
Physics, East Stroudsburg Univ., E. Stroudsburg, PA 18301

> -----Original Message-----
> From: Larry Woolf [mailto:Larry.Woolf@GAT.COM]
> Sent: Tuesday, February 04, 2003 10:29 AM
> To: PHYS-L@lists.nau.edu
> Subject: Re: a link to some interesting illusions
>
>
> Re: http://www.iscc.org/pdf/demystifying_screen.pdf
> Question and answer #1
>
> I believe that the question is appropriate.
>
> The question addresses the common misconception that "all of 
> the colors are
> in the rainbow."
>
> This may not be a misconception among physics teachers, but 
> it is among many
> students. Magenta is easily used as an example of a color 
> that consists of a
> mixture of short and long wavelengths -  a non-spectral color.
>
> The purpose of the site is to address common color misconceptions - as
> such, it does a pretty good job.