From: Debbie Berlin (debbie_berlin@yahoo.com)
Date: Tue Feb 19 2002 - 08:01:13 PST
Message-ID: <20020219160114.10233.qmail@web11403.mail.yahoo.com> Date: Tue, 19 Feb 2002 08:01:13 -0800 (PST) From: Debbie Berlin <debbie_berlin@yahoo.com> Subject: Re: student question about wet clothes
I considered the wet roads model but it brought two
questions to mind. First, if it's becoming a "solid"
reflecting surface like the road, it would appear dark
from certain angles. But, from other angles, it would
appear light just like a car approaching you lights
the roadway or like lights reflects from a mirror . .
. Second, I can visualize water puddling up in holes
on a roadway and making a single surface, but I can't
envision it in clothes. Can anyone help me see it? I
think I must be crazy to be worrying about this, but
it is really bugging me (perhaps more than my
students). Thank you!
--Debbie
> I think there may be a simple way to show the kids
> what is up....
> have them wet a piece of paper and hold it up to the
> light....if the light
> is going THROUGH the paper then it is not REFLECTING
> off the paper back to
> your eye....less light looks darker.....I think
> there may have been a decent
> article on this in the Physics Teacher in the not so
> distant past....Don???
>
> On a similar note, it always amazes me how the roads
> just disappear in my
> rural (streetlightless) neck of the woods when it
> has rained. The smoothing
> of the pavement by the water filling in the holes
> means the roads don't
> reflect light back to the driver -thank heaven for
> Bot's Dots!
>
> Looking Forward,
> Heidi Strahm Black
>
> ps Educational Innovations is now carrying the
> walkers for the Vector Toy
> snack!
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