Please see the nice clarification letter sent to me by Michael Dubson, Senior Instructor

Dept. of Physics University of Colorado at Boulder

These are actual photos of air craft breaking the sound barrier.

This phenomenon only happens at the instant an Aircraft breaks the sound barrier

and it literally appears like the aircraft goes through a wall.

I hope you find these pictures as fascinating as I do.

          WOW!

>-----OriginalMessage-----

>From:MichaelDubson[mailto:Michael.Dubson@colorado.edu]

>Sent:Monday,June19,200602:44PM

>To:fullerton-142@speakeasy.net

>Subject:"breaking"thesoundbarrier

>

>Greetings:

>

>Regarding the very nice pictures on your site of jets breaking the sound

>barrier, it is incorrect to claim that the condensation cloud around the

>plane "only happens at the instant an Aircraft breaks the sound

>barrier".  If humidity and temperature have the correct values, the

>condensation occurs continuously, as long as the plane maintains its

>speed. If you were to watch a movie of the plane, you would see the plane

>continuously wearing the conical condensation cloud like a skirt.

>

>-cheers, Mike Dubson

>

>

>MichaelDubson,SeniorInstructor

>Dept.ofPhysics

>UniversityofColoradoatBoulder

>Boulder,CO80309

>

>phone:(303)492-4938

>FAX:(303)492-3352

>email:dubson@spot.colorado.edu

>homepage:http://spot.colorado.edu/~dubson/

>

>