Re: pinhole Sensitivity to Light

From: Paul Doherty (pauld@exploratorium.edu)
Date: Wed Mar 23 2005 - 09:17:43 PST

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Message-Id: <77BC6A50-9BBF-11D9-B947-000A95B38012@exploratorium.edu>
From: Paul Doherty <pauld@exploratorium.edu>
Subject: Re: pinhole Sensitivity to Light
Date: Wed, 23 Mar 2005 09:17:43 -0800

Hi Christopher

There are many kinds of color blindness.
The most common involve the absence of either red or green cones.

Here is a plot showing the sensitivity versus wavelength of red, green,
blue cones and also rods (shown in gray)

http://www.phys.ufl.edu/~avery/course/3400/vision/
rod_cone_sensitivity.gif

You can see that a lack of red or green cones will not shift the
overall sensitivity peak by much.

All of the curves have been adjusted to be the same height, so they
don't show the comparison of sensitivities between the different types
of receptors.

Paul D

On Mar 23, 2005, at 8:46 AM, Christopher Reese wrote:

> The texts say that our eyes are most sensitive to a green-yellow color.
>
> But what if you are color blind? What color (if any) are you most
> sensitive too. This was a student question (good one I might add).
> This student is color blind....and does it depend on what kind of color
> blindness you have?
>
> Thanks
>
>
> Christopher Reese
> Science Teacher
> Woodside High School
> 199 Churchill Ave
> Woodside, CA 94062
> www.seq.org/~creese
> 650-367-9750 x8660
>
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