Re: The blueness of water

[Brian Whatcott <inet@INTELLISYS.NET>]

At 02:13 AM 4/28/02, Bill wrote:

> > *** If there were underwater floodlights, then the path length of light
> > passing through water and then entering your eye is certainly less than the
> > depth of the pool.
>
> Ooo, good point.  I never noticed the halved path length caused by
> underwater lighting.  I think the light is still decreasing linearly at
> those depths, so an internally-illuminated pool 10 meters deep would look
> approximately as blue as a top-illuminated pool 5 meters deep.

...

> William J. Beaty                            SCIENCE HOBBYIST website
> billb@eskimo.com                            http://amasci.com
> EE/programmer/sci-exhibits   science projects, tesla, weird science
> Seattle, WA  206-789-0775    sciclub-list freenrg-L vortex-L webhead-L


My attention monitor tripped on this linear suggestion. I assume
by contrast, an exponential decrease of light in an ordinary absorber.

Who will recall the relevant facts for me, please?




Brian Whatcott
  Altus OK                      Eureka!