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).
David
-----Original Message-----
From: Ludwik Kowalski [mailto:kowalskil@MAIL.MONTCLAIR.EDU]
Sent: Tuesday, November 04, 2003 4:41 PM
To: PHYS-L@lists.nau.edu
Subject: Rainbow interfernce ?
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.
Ludwik Kowalski