Re: pinhole what is gray?

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From: Paul Doherty (pauld@exploratorium.edu)
Date: Mon Apr 05 2004 - 20:56:35 PDT 

From: "Paul Doherty" <pauld@exploratorium.edu>
Subject: Re: pinhole what is gray?
Date: Mon, 05 Apr 2004 20:56:35 -0700
Message-ID: <web-374738@exploratorium.edu>

Gray has the same hue (color) as white, a mix of red green
and blue wavelengths.

It is unsaturated. A pure red is saturated, a pink is red
mixed with white and is slightly unsaturated. White or
gray are unsaturated.

Gray is dimmer than white and brighter than black.

Paul D

The perception of gray is definitely more complicated than
this. ;-)

On Mon, 05 Apr 2004 16:08:04 -0700
  "Jennie Brotman" <jbrotman52@hotmail.com> wrote:
>hi, quick question about light and color. if black
>objects absorb all visible wavelengths, what is the story
>for gray objects? what wavelengths do they reflect that
>cause them to appear gray?
>thanks,
>jennie
>
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