Ten years ago, I posted a long rambling post concluding with a thought-experiment on Usenet, and got no useful feedback. I'd like to try again here. I'd like to post a link to the original post, as it includes details on how I'd go about measuring the effect that I predict, but I don't seem to be allowed to post urls yet. Instead, I'll include a simple drawing that will preclude any need to even read the original post. It involves a simple interferometer using any long-coherence CW laser. Forgive my primitive drawing skills and terminology. If you find quantum physics at all interesting though, I hope you'll have fun considering my thoughts and correcting them as necessary. In the image below, nothing is to scale, and I pulled my distances out of a hat so to speak, but that should not affect the principle I'm trying to understand. If the text looks blurry, maximizing the page should fix it.