[General] Verification of Light Interactions

Sat Aug 29 10:22:19 PDT 2015

Hi Robert Hudgins

Thank you for the email.  Your concepts show an "out-of-the-box"
imagination, and so they were intriguing to me.

So far, I have run some simulations to see what the interference patterns
would be for waves which did not reflect off each other at all.  The way I
know that these simulated waves do not reflect, is of course because I wrote
the simulations to explicitly show only two waves passing through each
other, with no ability to reflect off each other.

Here are the results of some of those simulations:

Image: 1, Left Side, Two waves of the same frequency and phase, incident at
45 degrees.

Image: 2, Right Side, Two waves of the same frequency with 180 degree phase
shift, incident at 45 degrees. Note the expected interference pattern and no
reflection.

Image: 3, two waves of different frequencies passing through each other.

So far, using simulations, and varying angles of incidence, we are able to
reproduce the experimentally observed interference patterns. And this is
done with no reflection of waves.  

So, sorry, I do not see any physical reason to assume that waves reflect off
one another. 

Chip

From: robert hudgins [mailto:hudginswr at msn.com] 
Sent: Friday, August 28, 2015 9:58 AM
To: chipakins at gmail.com; general at lists.natureoflightandparticles.org
Cc: robert hudgins <hudginswr at msn.com>; Ralph Penland <rpenland at gmail.com>;
Andrew meulenberg <mules333 at gmail.com>
Subject: Verification of Light Interactions

Dear Chip,

   To have our SPIE  presentation, with its data, receive a broad,
non-specific and vocal rejection from many attendees was personally
confusing.  From our perspective, those results (and ideas) had been
thoroughly tested, retested and reconciled with current literature. The
openness you indicated by your intent to try replicating some our results
felt refreshing.

What follows are some pointers about possible ways to work-around the
problem of short wavelength intervals:

The standing wave frequency is 1/2 the wave length of the light used.
Consequently, some method of expansion is usually required for clear
visualization of a standing wave pattern.   Many investigators use Otto
Wiener's 1890 method or some variation.  Recently, a simplified classroom
demonstration procedure was published.

http://scitation.aip.org/content/aapt/journal/ajp/77/8/10.1119/1.3027506

Standing waves of light in the form of optical lattices are currently a
workhorse for manipulating ultra-cold bosons and fermions.  The atoms are
trapped between the oscillating potentials. 

Another important standing wave/interference demonstration is the 1837
Lloyd's mirror experiment.  

For our study we used a precision 15 X 5cm mirror.  A laser beam was
reflected a shallow angle and the resulting interference pattern was
examined after expanding its image.  This was accomplished with a convex
mirror placed near the end of the reflection zone.  We did this experiment
to demonstrate that a mirror reflection would substitute for one of the
beams in a two crossing-beam interference pattern, and that the null zones
in the crossed-beam interference behaved as mirror--like reflection zones.

The set-up we use for our interference studies is very simple.   It requires
only two components; a laser and a variable density filter.  The variable
density filter becomes a beam splitter when the laser beam is reflected from
both the front and the back (partially mirrored) surface.  Adjusting the
relative intensities and phases of the emerging beams is accomplished by
changing the reflection angle and the point where the beam strikes the
splitter.  Proper adjustment should give two clearly separated, and
independent beams.   This system gives clear, unambiguous results.

We began our pursuit as a search for the "cancelled" energy of light
interference.  It was quickly obvious that all the light energy in the beams
emerging from the beam splitter was detectable in the interference patterns,
that formed at some distance from the splitter.   (Well after the beams had
merged.)  Although interference confined the light to a smaller area,
(compressed the light) we found no evidence of "cancelled" light waves
(energy) or of photodetector limitations.       

Hudgins, W. R., Meulenberg, A., Ramadass, S., "Evidence for unmediated
momentum transfer between light waves," Paper 8121-39, Proc. SPIE 8121
(2011)

 [1]Hudgins, W., R., A. Meulenberg, A., Penland, R. F. "Mechanism of wave
interaction during interference," SPIE (2013) Paper 8832-7, in The Nature of
Light: What are Photons?   

Please let us know if you were successful, or not, with your testing.

Bob     

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