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Re: Rainbow interfernce ?



I'm with Ludwik. I thought the dark region was because the water
droplets tended to refract the sunlight away from our eyes at that
observation angle.

____________________________________________________
Robert Cohen; 570-422-3428; www.esu.edu/~bbq
East Stroudsburg University; E. Stroudsburg, PA 18301

-----Original Message-----
From: Forum for Physics Educators
[mailto:PHYS-L@lists.nau.edu] On Behalf Of Emigh, David
Sent: Tuesday, November 04, 2003 1:54 PM

If you look at the picture you will notice that the sky and
mountains between the two rainbows is darker then the sky to
the left of the set. This is the interference effect noted in
the letter (purely partial destructive interference).

-----Original Message-----
From: Ludwik Kowalski [mailto:kowalskil@MAIL.MONTCLAIR.EDU]
Sent: Tuesday, November 04, 2003 4:41 PM

The November issue of Physics Today has a
color photo (on page 10) of a double rainbow.
The short description states that "the effect of
interference is clearly visible in the photograph."
I am not able to recognize that interference
effect on the photo. Pleas help.