Re: [Phys-L] another Gedanken from PTSOS

["Jeffrey Schnick" <JSchnick@Anselm.Edu>]

I would say that in the classical physics model we do this, that is get
2 beams traveling in the same direction, one right along with the other,
180 degrees out of phase with the other so that we achieve total
cancellation, whenever we put an opaque obstruction in the path of a
beam of light.  The original beam gets the charged particles within the
obstruction oscillating in such a manner that they create a beam of
light that everywhere forward of the obstruction that interferes with
the original beam in such a manner that the interference in the forward
direction is totally destructive.

> -----Original Message-----
> From: phys-l-bounces@mail.phys-l.org [mailto:phys-l-bounces@mail.phys-
> l.org] On Behalf Of Bernard Cleyet
> Sent: Wednesday, May 16, 2012 10:22 PM
> To: Forum Physics Educators
> Subject: [Phys-L] another Gedanken from PTSOS
>
> > > I've often wondered a related question:
> > >
> > > I understand about interference in fringes, and it makes sense that
the
> energy lost at the nodes shows up at the anti-nodes.
> > >
>
> bc doesn't think so.
>
> > > But:  What if you were able to get 2 beams to travel in the same
direction,
> one on top of the other.  Say, with a partially silvered mirror.  If
you could get
> two out-of-phase waves to travel in the same direction, one behind the
> other, you could achieve total cancellation.  The beams would never
diverge,
> so there would be no point where the energy reappears - it would
> effectively be gone forever.
> > > Would this be possible?  I'm assuming not, but why not?
>
>
>
> _______________________________________________
> Forum for Physics Educators
> Phys-l@mail.phys-l.org
> http://www.phys-l.org/mailman/listinfo/phys-l