----- Original Message -----
From: Matthew McCann
To: Ode Coyote
Sent: Tuesday, December 07, 2004 9:46 AM
Subject: Re: CS>CS and "floaties"
Hi, Ode,
An 1/8-inch floatie can produce a very good reflection of
the beam of a laser pointer. Even if interference is
not noticeable to the naked eye (i.e. iridescence)
it may be measureable using a laser pointer at
various glancing angles. At glancing angles there
should be optical polarization effects too.
Incidentally, I think the Tyndall Effect scattering
of light produces polarized light too.
Matthew
----- Original Message -----
From: Ode Coyote
To: Matthew McCann
Sent: Tuesday, December 07, 2004 6:08 AM
Subject: Re: CS>CS and "floaties"
I don't think my eyes go that small..I don't recall seeing one on a quarter
inch oil slick either.
I'll start paying attention.
Ode
At 07:34 AM 12/6/2004 -0500, you wrote:
>>>>
If floaties are metallic silver monomolecular films on the
air-liquid interface, and if they exhibit interference fringes
(like oil slicks do), it may then be possible to measure the
average thickness of the particles. Two laser diode
wavelengths would give two independent ways of measuring
the layer thickness. Has anybody noticed interference
fringes on the floaties?
Matthew
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