Re: pinhole refraction of light in water

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From: Paul Doherty (pauld@exploratorium.edu)
Date: Thu May 01 2003 - 19:27:17 PDT 

Message-Id: <l0311071ebad787aab377@[192.168.111.161]>
Date: Thu, 1 May 2003 19:27:17 -0700
From: Paul Doherty <pauld@exploratorium.edu>
Subject: Re: pinhole refraction of light in water

Camilla

It's a trick!

You use two rays, one from each eye to determine the location of the fish
by parallax, just like you do for everyday objects in air.
Paul D

>I think I understand the basic reason why a fish in water appears to be
>closer to the surface due to refraction of light. However, when your brain
>assumes the refracted ray traveled along a straight line path from inside
>the water to reach you, how does it know how far back to trace that line?
>How do we know how far back to trace it in a diagram? Thanks!
>
>
>
>
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