User talk:71.229.145.133

Gaussian beam
Hi. I reverted your edits to Gaussian beam because you removed material without explaining why, and becuase the assertion that the Gouy phase is related to rays crossing the axis is dubious and unsourced. Rays don't really exist. They are an abstraction used in a simplified model (Geometric optics), not a real physical thing. Trying to explain a phase shift in a physical optics problem by referencing rays is a dubious approach. If there is anything to this idea, we would at least need a reliable source for it. I cleaned up the section and removed the dubious claim.--Srleffler (talk) 02:43, 21 February 2020 (UTC)