Here's a mental exercise that I would like to be explained in terms of
classical wave model physics. Please ignore the difficulty in actually
setting up such an experiment in reality.

We have two watts of coherent, single-frequency light sourced from a
laser. We set up an inference exercise by dividing that single two-
watt beam into two one-watt beams. We do whatever is necessary to
get those two beams to be 180 degrees out of phase. Then we recombine
them along an identical vector path. Just before the recombining,
the two waves each possessed energy and momentum. After the recombining,
the two waves disappear through 100% cancellation. What happens to the
energy and momentum pre-existing in those two waves?
--
cheers, Cecil http://www.qsl.net/w5dxp



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W5DXP wrote:
Here's a mental exercise that I would like to be explained in terms of
classical wave model physics. Please ignore the difficulty in actually
setting up such an experiment in reality.

We have two watts of coherent, single-frequency light sourced from a
laser. We set up an inference exercise by dividing that single two-
watt beam into two one-watt beams. We do whatever is necessary to
get those two beams to be 180 degrees out of phase. Then we recombine
them along an identical vector path. Just before the recombining,
the two waves each possessed energy and momentum. After the recombining,
the two waves disappear through 100% cancellation. What happens to the
energy and momentum pre-existing in those two waves?

It heats up your beam combiner.

--
Joe Legris

"W5DXP" wrote in message
...
Here's a mental exercise that I would like to be explained in terms of
classical wave model physics. Please ignore the difficulty in actually
setting up such an experiment in reality.

We have two watts of coherent, single-frequency light sourced from a
laser. We set up an inference exercise by dividing that single two-
watt beam into two one-watt beams. We do whatever is necessary to
get those two beams to be 180 degrees out of phase. Then we recombine
them along an identical vector path. Just before the recombining,
the two waves each possessed energy and momentum. After the recombining,
the two waves disappear through 100% cancellation. What happens to the
energy and momentum pre-existing in those two waves?
--
cheers, Cecil http://www.qsl.net/w5dxp



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The optical element that recombines the two beams get the energy (or motion)
the final effect is temperature increase of the combiner.
Which is than reradiated in IR band.

Sincerely,

Mathew Orman
www.ultra-faster-than-light.com
www.radio-faster-than-light.com

Joseph Legris wrote:
It heats up your beam combiner.

The beam combiner is just a couple of pieces of glass.
--
73, Cecil http://www.qsl.net/w5dxp



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Mathew Orman wrote:
The optical element that recombines the two beams get the energy (or motion)
the final effect is temperature increase of the combiner.
Which is than reradiated in IR band.

That optical element is just a couple of pieces of glass. Is
heat dissipation the only possibility?
--
73, Cecil http://www.qsl.net/w5dxp



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"W5DXP" wrote in message
...
Mathew Orman wrote:
The optical element that recombines the two beams get the energy (or
motion)
the final effect is temperature increase of the combiner.
Which is than reradiated in IR band.

That optical element is just a couple of pieces of glass. Is
heat dissipation the only possibility?

psssst.... he wants you to say it gets destructively canceled and reflected
into standing waves.... make him happy and maybe he won't torture this group
like the other one where this discussion has been going on for several days.

David Robbins wrote,

"W5DXP" wrote in message
...
Mathew Orman wrote:
The optical element that recombines the two beams get the energy (or
motion)
the final effect is temperature increase of the combiner.
Which is than reradiated in IR band.

That optical element is just a couple of pieces of glass. Is
heat dissipation the only possibility?

psssst.... he wants you to say it gets destructively canceled and reflected
into standing waves.... make him happy and maybe he won't torture this group
like the other one where this discussion has been going on for several days.


Actually, several years.

Tom Donaly

"Tdonaly" wrote in message
...
David Robbins wrote,

"W5DXP" wrote in message
...
Mathew Orman wrote:
The optical element that recombines the two beams get the energy (or
motion)
the final effect is temperature increase of the combiner.
Which is than reradiated in IR band.

That optical element is just a couple of pieces of glass. Is
heat dissipation the only possibility?

psssst.... he wants you to say it gets destructively canceled and
reflected
into standing waves.... make him happy and maybe he won't torture this
group
like the other one where this discussion has been going on for several
days.


Actually, several years.


i was just thinking of the latest resurrection of it.

"W5DXP" wrote in message
...
Mathew Orman wrote:
The optical element that recombines the two beams get the energy (or
motion)
the final effect is temperature increase of the combiner.
Which is than reradiated in IR band.

That optical element is just a couple of pieces of glass. Is
heat dissipation the only possibility?
--
73, Cecil http://www.qsl.net/w5dxp



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I think I know what you are looking for.
Try radiation pressure phenomena.
It states that if wave is completely reflected the momentum transfer is
twice the momentum than when the wave is completely absorbed.

Sincerely,

Mathew Orman
www.ultra-faster-than-light.com
www.radio-faster-than-light.com

Light is EM field. Each beam produces an EM field. When recombining, E/H fields
of a beam are respectively opposed to E/H fields of the other beam. In theory of
fields, fields do not disappear nor react with each other, they superpose, so
the energy/momentum of each beam is still there. But the possible effects of the
recombined beams on charged particles can't be detected because they oppose each
other.

FG

"W5DXP" a écrit dans le message de news:
...
Here's a mental exercise that I would like to be explained in terms of
classical wave model physics. Please ignore the difficulty in actually
setting up such an experiment in reality.

We have two watts of coherent, single-frequency light sourced from a
laser. We set up an inference exercise by dividing that single two-
watt beam into two one-watt beams. We do whatever is necessary to
get those two beams to be 180 degrees out of phase. Then we recombine
them along an identical vector path. Just before the recombining,
the two waves each possessed energy and momentum. After the recombining,
the two waves disappear through 100% cancellation. What happens to the
energy and momentum pre-existing in those two waves?
--
cheers, Cecil http://www.qsl.net/w5dxp