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On Fri, 13 Feb 1998 SCIAMANDA@edinboro.edu wrote:of
Bill Beaty wrote:Perhaps the problem is that I have misconceptions regarding the nature
. . .
spatial coherence. I imagine it this way: spatial coherence withoutextended
temporal coherence looks like broadband starlight. Temporal coherence
without spatial coherence looks like a large, diffusely glowing,
object which emits perfectly monochromatic light without even any sudden
jumps in phase of the emitted waves.
If my examples are OK, then my laser misconception can be restated thus:but
I understand how lasers create nearly-perfect monochromatic light,
how do lasers create point-source light?
. . . Textbooks seem to claim thatextremely
spatial coherence is caused by the mechanism which also creates
temporal coherence. Either they are extremely wrong, or I am
confused.I guess this is your bottom line point (iconoclast! :) ). The resonant
((((((((((((((((((((( ( ( ( ( (O) ) ) ) ) )))))))))))))))))))))
William J. Beaty SCIENCE HOBBYISTwebsite
billb@eskimo.com www.eskimo.com/~billbscience
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