"Larry Dighera" wrote in message
...
On Thu, 06 Jan 2005 17:32:43 GMT, "G.R. Patterson III"
wrote in ::

Larry Dighera wrote:

If I'm not mistaken, coherent laser light is all in phase.
Doesn't
that cause it to have more energy?

No, but it will deliver more energy in the visible spectrum, and it
can be tuned
to deliver most of its energy in a very narrow band, which a
typical
incandescent light source cannot.

I'm way out of my depth on this subject, but this is the way I
understand the physics of coherent light verses light that is not
coherent.

Because the photons of coherent light arrive at the target at the
same
time, they "pound" harder against the surface upon which they
impinge
than they would if they arrived at varying times. I imagine the
physics to be similar to sonic resonance. So perhaps the photons
don't have more energy, but they have a greater effect than light
that
is not coherent.

I am afraid your concept of what constitutes a coherent source of
light is completely wrong. Why don't you read up something on the
topic?
In the meantime, it might be better if you restricted your interests
to aviation.

Franz



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