In any typical interference experiment (eg double slit) the energy which
has disappeared from the null regions now shows up in the maxima regions -
a spatial re-distribution of the same total energy.
Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net http://www.velocity.net/~trebor
----- Original Message -----
From: "Tim O'Donnell" <odonnt@CELINA.K12.OH.US>
To: <PHYS-L@lists.nau.edu>
Sent: Wednesday, May 01, 2002 3:35 PM
Subject: Sound Cancellation
When a crest of one wave meets a trough of another wave
or when a compression of one wave meets a rarefaction of
another wave there is cancellation. Each wave has
energy. The energy cannot be just cancelled - law of
conservation. Does the energy go into heating the air
(medium)? Normal levels of sound don't really carry that
much energy so I would expect the level of heating to be
small. Am I on the right track?
Tim O'Donnell
Instructor of Physics and Chemistry
Celina High School
715 East Wayne Street
Celina, Ohio 45822
(419) 586-8300 Ext 1200 or 1201
odonnt@celina.k12.oh.us
"Chance only favors the prepared mind." - Louis Pasteur