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Article #1207

Re: Blueness

#1207
From: Darryll Hobson
Date: Thu, 28 Jan 1993 19:45
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Actually, the fact that a body of water reflects the "blue sky" and that is
the only reason it is blue...  is wrong.  Common misconception.

If you consult a somewhat detailed physics book (or perhaps look in an
encyclopedia under "water" or "color" ) you will find that a water molecule,
H2O is in fact "colored" blue...  ie:  white light striking the H2O causes it
to emit a "blue" wavelength photon.
 
The reason water doesn't look blue, if it's in a shallow container, is 
similar to observing tinted glass...  if you look through 1 panel of tinted
glass...  it looks clear, if you look through a stack of 10 panels, it will 
look colored...  (probably brown).  

Just as one may ask...  how many panels of tinted glass do I have to look 
through before it "looks" brown?  A person (ie: myself, or my old grade 12
physics teacher) may wish to ask how deep water must be for it to "look"
blue...
 
Of course, the whole matter is complicated by the fact that every body of 
water we look at, is not completely H2O...  
 
Owell...
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From: hobson@mpr.ca (Darryll Hobson)
Subject: Re: Blueness
Message-ID: <1993Jan28.194545.27490@mprgate.mpr.ca>
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Date: Thu, 28 Jan 93 19:45:45 GMT
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