Re: Color constancy

["D.V.N.Sarma" <narayana@HD1.VSNL.NET.IN>]

On 1 Nov 2000, at 17:41, Ludwik Kowalski wrote:
> Suppose the chemistry in your retina is dramatically different
> from the chemistry in my retina, when we are looking at grass.
> This would not prevent us from using the same word, green,
> while referring to sensations.
> Ludwik Kowalski
You are right. We are taught to synchronise the names of colors
with the names the others use. A teacher or a parent shows a
colored object and gives it the name "yellow" or "green" etc.
Irrespective whether the cerebral sensations of the two persons are
the same or not, the child associates with his cerebral sensation
the word "yellow" or "green". This is how the agreement in the
description of color works. Only experiments with signals that
pass through the optic nerve or the electrical activity in
corresponding region of the brain can determine whether they
have the same sensation or not.

regards,

Sarma.