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Re: [Phys-L] Light Spot.

A picture is really needed to confirm brightness observations.
Unfortunately there are any number of optical illusions that can fool the
eye, and memory is always incomplete. Your description may be correct, but
without photo evidence, it is difficult to figure what you really saw.

John M. Clement
Houston, TX

On 1/13/2013 8:34 PM, wrote:
This might be an Poisson bright spot (as seen by Arago) formed by
diffaction by the sum and the airplane. See the URL

Alex. F. Burr

In a message dated 1/13/2013 6:52:43 P.M. Mountain Standard Time, writes:

I noticed a bright spot
at 2 o'clock
Though I too favor the diffracted bright spot explanation,
it is usually described as a bright spot
in a dark shadow. As described in the Enc Brit paragraph mentioned
above, it is only
NEARLY as bright as the surrounding illuminated scene: what
I saw was BRIGHTER than
the surround, with no dark shadow evident.