To Jim, and anyone else who wants to discuss it. I've created
a graphic illustrating reflections from a thin-film when the
incident laser beam is at an angle to the thin-film surface.

http://www.qsl.net/w5dxp/weblaser.GIF

Question for Jim: I can see Reflection A and Reflection B.
I can measure the irradiance of Reflection A and Reflection B.
Are the two reflections really there or not? If they are there,
do they possess energy and momentum?

That will get us started.
--
73, Cecil http://www.qsl.net/w5dxp

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