Maybe it's abit like the Alexander's ring between a double rainbow, which is down to total internal reflection. So that less light reaches the eye, thus making it appear darker...
--- On Mon, 27/4/09, Paul Lulai <plulai@stanthony.k12.mn.us> wrote:
From: Paul Lulai <plulai@stanthony.k12.mn.us>
Subject: Re: [Phys-l] optics
To: "Forum for Physics Educators" <phys-l@carnot.physics.buffalo.edu>
Date: Monday, 27 April, 2009, 8:35 PM
My 6 year old stumped me with a similar question. When taking a bath, why is the portion of her arm under water have a slightly different color?
Paul Lulai
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